The Frigo price isn't a bad one. Really. You'll have to find an industrial supply house, have the capability to transport large sheet stock, and have the right cutting tools (plasa cutter or LARGE shear). Stainless stock isn't cheap. You'd be looking at a couple of hundred dollars worth of materials, and that's if you have the right tools already. If you have to buy tools, well you're well well over that price. (You really can't cut stainless well with a hand shear. It warps too badly and can't be knocked back into place like copper can.) You could try to find a metal fabricator who can custom fabricate to your dimensions. They're usually located in the less savory parts of town and cater to restaurants and industrial plants. That will be somewhat cheaper, but you'll still have to transport and install.

This was a "build it on site in one day with what you got" scenario. He didn't have time to build it with full mortise & tenon joints and veneer the panels with myrtle for goodness sake. The better design, which would have made it passable, would have been to incorporate a baseboard; even a flat 1x2 screwed to the floor with a 1/4" plow to capture the plywood edge would have helped. (profile the edge of the 1x2 to match base shoe) At this stage, best case is to add some full width cleat at the bottom, inside, to strongback the 1/4" sheet. If not that, then 6" rips of 3/4" ply behind the bottoms of those applied doors, to use their strength to reinforce the flimsy bits. Any of you built a pair of 80" mortise & tenon french doors, stain grade, on site, on the tailgate of your truck? I can take mine out, too... Who needs a fancy shop to get stuff done? It's just a crutch, IMO. just kidding, we're all friends here. Casey

What is the material can they be polished or buffed?

Indeed you have alot of circuits but dont be concerned with the quantity nor the total of all the beaker amps added. example being those 4 water heater @ 40 A will only draw initiaily at startup and would probably never all run together ever again. The suggestion that induction cooking draws alot is incorrect as it is extremely efficient and draws uses much less energy than a conventional cooktop (just look as the amp rating) youll likely need two panels for the breaker space. The unknown factor you havent detailed is whats going on in those outbuilings. If they sre for blown woodworking shops lets say, then all bets are off. At that point you might consider just bringing in a separate service to the outbuidings. Its done all the time at would be less costly. Just food for thought.