I agree with the others. Many start with steam pans. For the money you are talking I'd check into a small used flat pan. They are available many places. Check ebay, Craig's list, Bascom Maple, and several other equipment dealers. Also put out a Wanted ad on this sight. Look for something in the 3 to 6 sq ft of flat area. Then make an arch out of cement blocks. While turkey friers do ok they are very costly to run. Propane refills quickly add up. By the way, my first year I started with 27 taps and by mid season I had 70.
Dave Klish, I recently bought 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.