Hehe, sorry if we bombarded you with information overload there, sputnikxxx! At least the concensus is that a 4-channel glow trainer is a good idea while you're building your J3 Cub.

Don't scrimp on field equipment if you don't have to, having the right tool for the job can make a big difference with glow planes. The fuel pumps are for taking fuel out of your tank as much as they are for putting fuel into them. Having an electric starter and battery is a lot more expensive than simply using a chicken stick, but some new engines can be a lot harder to turn over than others.