Another question regarding what might be in your future in 5 or 10 years relating to tap count and evaporator size? If a 2x4 or 2x6 will be all you see, that 16x16 should be good.
Back in 2003 when I built my 16x24 for a 2x6 wood fired I thought it was a little over kill, now with a 3x8, a 5' wide wood rack that is carried by my tractor on forks, a small RO room, a filter press, a water jacketed bottler, a 2x6 finisher, some solar equipment, a sink, a tankless water heater, some shelves for display and 2 small freezers it is little no longer a little overkill. I planned several times to add an addition, but life got in the way. I wish I had built it 20x30 or even 24x36.
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.