Something I wanted to include but forgot was in regards to canning, the stove, and brewing system. I had a stray thought once -well I have lots of those- but this one was that if I had the right canning rack, I could water bath can in my 240V boil kettle. It's a keggle though, and the rim isn't fully cut, so this is more a wild idea as it would need a specific size rack and support above the element. But since you are in the planning stage, perhaps some idea might work out. On my electric stove, the water bath takes time to get up to speed and also it's difficult to run two canners as I think I mentioned. I don't know if you can get away from stove involvement completely when canning but maybe a set of burners, either gas or electric might have a smaller footprint. There are 3 vessel natural gas systems, you could use 3 burners, or BIAB. Temperature controllers are possible there. You might not get every bell and whistle out of the most advanced ones. If you are canning, you are going to need a hood anyway too. I don't know if you mentioned having natural gas available. Propane may not be as efficient.