Don't buy those "kits"; they are simply an assortment of the cheapest parts available, and they don't work well together. While I couldn't find the inductance specs for those specific motors (a red flag in itself) the inductance tends to be high, like 9 mH, which means they want about 96 vdc supplied to run at full speed. But they've given you a 36 volt power supply to run it. "Reviews" are easily faked, and commonly are. You can look up those drives on this site and see what people really think of them: I'd say hold off on the motors and electronics until you've got the frame built. This will give you time to do some more research into these matters and come up with something that may not be the absolute cheapest solution, but that might actually work.