Whatever tank you get, clean it well before use. Back in my early days I bought a 550 gal vertical tank, quickly rinsed it, and set it to collect sap from about 150 taps. My first batch of syrup had a "plastic" taste, I had to sell about 8-10 gal of syrup to Bascom as commercial at a very low price. I then hauled the tank home, cleaned it using chlorine bleach and then rinsed it 4-5 times, draining it fully after each rinse, it was then good.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.