+1 on the oil tank arch; I started with a turkey fryer, then built an arch from a very old water tank, then went to an oil tank arch, added a copper coil preheater around the chimney and added a blower (air under fire) which was the absolute best addition so far. Been very happy with the oil tank arch setup, I run a 2x4 pan and a 16"x2'pan simultaneously. Whatever you build, pay attention to insulating the rig - keep as much heat inside and directed to the bottom of the pan(s) as possible; I did that when I went from the water tank to the oil tank arch and what a big difference; I have one inch thick insulating board and old thick fire brick in front of that lining the entire interior; made a huge difference.
2010 - 12 taps, turkey fryer, 4 quarts
2011 - 24 taps, homemade arch from old water tank, 16"x24" flat pan, 16+ quarts
2012 - 9 taps, 3 pints, what a season
2013 - 60 taps, homemade oil tank arch with 2'x4' flat pan, 16"x24" finishing pan on electric range, 55 quarts
2014 - 80 taps, homemade oil tank arch with 2'x4' flat pan, 16"x24" finishing pan on electric range, 40 quarts
2015 - 100 taps, 15 gallons
2016 - 115 taps, 13.5 gallons
2017 - 120 taps, 13 gallons
2018 - 130 taps, 11 gallons