Trying to figure out how many? How much? What I have so far is 8 x 350 gallon poly fermenters, a 100 gallon spirit still in the works, a 400 gallon stripper still in the works, two 300 gallon ss tanks, one 375 gallon ss Hot liquor tank, a 200 gallon mixing or bottling tank, 40 nice French oak barrels. And a small, 175K BTU propane boiler. and NO MASH TUN. But a nice 1,000 gallon tank I can cut in half and make two mash tuns, or a 500 gallon mash tun and another still. I expect to direct fire the 400 gallon still, and use the small boiler for the 100 gallon spirit still. I think I can jacket the Mash tun and use the boiler for that too. I know I have too many fermenters, I think I only need 4. Do I need two 500 gallon mash tuns or will one suffice? It's getting crowded, and I don't want to make/buy something I am not going to use.....