I have two stock pots, one is a 12qt, I believe... it's really big! but I'm so glad I bought it now b/c when I actually make stock, I have enough room. Also great for doing double batches of chili or whatever (and when it takes so much extra time to prepare everything, making double is a good thing!). I also have an 8qt which came with a SS cookware set which gets used a lot too. I probably use that pot almost more than anything, but I am glad to have a really big one when I need it too. I just bought that one at marshall's I think.
I've heard raw milk yogurt is runnier than pasteurized milk yogurt. I started my pasteurized yogurt with stonyfield, and I think it is decently thick. DH likes custard style yogurt though, and I just tried adding powdered milk for the first time (which I know has it's own issues) but it did make it very thick. I don't think you need a yogurt maker. With my old oven, just leaving the light on, the oven was at 111 degrees - perfect! My new oven gets too hot with the light though, so I need to do something else. If you have a thermometer you can check the temp with, that is an easy way to go, IMO.