I have a 500 gallon LP that will be a storage tank. So what do I really need to add to this? Do I need a hot in and cold out for the wood boiler as well as one each for the load side or can they share on the cold (bottom) side? Also how many wells for the thermometers in the tank, one on bottom and one on top or are more needed? I am just looking for tips on the easiest way to do this but I don't really want to many extras or unnecessary ports or fittings on this tank. I plan on going with the spray on foam for insulation, how many inches are needed? Thanks for any tips.