With a cupola, windows and a hood on the pan(s) plus the smoke stack out it should be OK. I suggest however you calculate your cost for the finished sugarhouse and compare that with a ready made shed. While it's bigger than you are talking, I bought a 14x28 Amish built shed with a hip roof about 16 months ago for $7280. It has extra runners under the floor and an 8W x 7.5'H double door plus 2 man doors 3x6'8". I drive my 4000# tractor with a cab in it and store it inside. If you were to get something similar you would still need to add a cupola and cut in the stack plus protect the floor by the evaporator, but it may prove handier.
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.