How can I achieve flavorful, gelatinous pork broth economically?

Good home-made stock is easy and cheap to make. All you need is an old stock pot (no lid needed, you want the water to evaporate), and a bunch of pork bones and connective tissue. The bones will add the pork flavor, while the connective tissue will break down into gelatin.

The best way to get the pot is a thrift store (charity shop to UK types), and the best way to get the bones is to make friends with a butcher - they often have loads of bones and connective tissue that go into the garbage and are happy to sell it dirt cheap.

To make the stock all you need to do is add the bones and connective tissue to the pot with enough water to cover them completely, and cook it down for hours and hours. Many chefs would recommend adding stock vegetables like onions and carrots at the beginning, and straining them out after an hour. After a few hours you'll have all the good stuff out of the bones and connective stuff, so strain them out and then simmer the stock until you have the consistency and flavor concentration you want. You can cook it down until it's a syrup if you want, although that takes a long time. You can then freeze it for months.

If the amount of gelatin you want isn't there you can simply add unflavored gelatin, it's very inexpensive and easy to use.

EDIT: As for smoke, I wouldn't add it in to your broth. You won't always want the smoky flavor and if you do it's easy enough to add some smoked pork or liquid smoke later if you do. Leaving it out gives you more flexibility later.

I recently began using a pressure cooker for my stocks. I've found that in 45-90 minutes I can achieve the kind of flavor and mouth feel that you are describing. The pressure cooker is not just faster, I find it creates more flavorful stocks with a much better mouth feel. To achieve smoke flavor, you could smoke the pork bones and/or other stock ingredients...you can even smoke the water that you are going to use for the stock, use a smoked ham hock, or use a very small amount of liquid smoke.

What you are looking for is cuts or parts that are high in connective tissue and other collagen sources, like cartilage.

If you are looking at meat cuts, something like the shoulder has a lot of the tendons, ligaments and connective tissues. That's why that cut would be horrible with faster cooking methods, like grilling on a hot grill, but does great with lower temperature slow-cooking methods, that break down the collagen from the meat tissues. Another advantage is that these "tougher" cuts are cheaper than the ones with more "uninterrupted" muscle meat.

I think pork knuckles/ham hocks are specifically made for this purpose. That's the equivalent in human anatomy to the ankle - the joint that connects the foot/hoof to the leg.

The best way to make a good stock is using bones. Ideally, that's all you want to use to make your stock. The gelatinous stock comes from collagen and the best way to get any of that is to use bones. The best way I've found to do it is to make stock with all the bones left over after you've eaten ribs. Recently, I made 2 full racks of baby back ribs, and the meat was tender enough to just pull out the bones after cooking. I took the bones in a pot, filled it with water up to just a few inches above the bones, and simmered for 8 hours. Of course, I was making a basic stock so I had a mirepoix and stuff, but that's the base of how to get the gelatinous stocks. You can season it how you like. Afterwards, strain it and you'll have a beautiful stock. Remember, a simmer is not a boil. You want to see the water moving inside, but if you see bubbles coming up, turn down the heat a few degrees until you get there. Keep adding water until the stock has simmered for the full 8 hours. For chicken, 3-4 hours is good and for beef, 10-12 hours is good. It's all different but to sum it all up, use the bones.

I make the best gel/broth ever. After eating a spiral ham I take all the fat and left over meat bits and the bones and throw it in a big pot filled with water. I slow boil this for about three days constantly putting more water in (turning it off at night). when the bones are porous and softish I stop. let it cool, strain every thing out, separate the bones from the fat and meat. Then puree the meat, fat and broth together until it looks like very wet pate. Cook it down again. strain the solids out (save the meat solids and make hash OMG TO DIE FOR) refrigerate the liquid. When the fat is solid on the top peel it off and you will have the nicest, jiggliest ham jelly ever. I render the fat down a few more times by heating and cooling it and stripping the fat off the top. it gets cleaner and whiter every time as more meat "contaminants" are separated. what you eventually end up with is pure beautiful lard which makes the most heavenly biscuits and pie crusts. NOTE: I do this with all boned meats. Beef yields tallow which is great for cooking, Turkey and chicken dont give up a good fat but out of a Thanksgiving Turkey I can get enough broth to enhance my cooking for at least 6 months. I store 4 cups in a Freezer Ziplock quart bag, frozen flat. I also have osteoporosis so drinking this homemade broth is very good for me. GOOD EATING