If all you have to do is make floor patches why not just cut the metal to size and take it to a sheetmetal shop and have them bend it... that's surely got be cheaper than buying a tool to just do one job.
This would be your cheapest way if your not going to use the brake alot, we have alot of people come to our shop with there metal asking to form it. Beer goes alot further than cash in some shops for things like that.
If you are going to do alot of fab work your self make sure the brake is rated not only for 16ga but that the top leaf has not only an up and down adjustment but a back and forth also is movable for heavier gages or if you want fold a rounder edge. 20ga brakes are junk IMO and if your going to buy unless it's a screaming deal don't buy one less than 48" long or you'll find your self buying beer for a sheet metal shop agian.
Top link does'nt mention max gage but gives an idea of cost, 2nd link is very close to our baby box and pan at work, rated for 16ga but 18ga seams to be the max @ 48". Still a good little brake and it cost us around $700 with shipping a couple/three of years ago.
http://www2.northerntool.com/metal-fabrication/benders/item-143347.htmhttp://www.artools.com/virtual%20showroom/saber%2048x16%20B&P.JPG
