I am looking for the most basic ,cheapest, welding system there is.?

Question

I need to put together a basic go kart frame and i am using metal pipes for it. not big ones but small ordinary plumbing pipes you would find under the sink. if you have any other ideas just let me know.

Answer 1

ARC welder. (stick welder) You can purchase the units to weld thinner (<1/4") stuff for a couple hundred bucks. If the metal is galvanized though, be VERY careful, can release toxic vapors.

Answer 2

Flux-rod Arc welding ( if you look it up, look up arc welding). It is the only type of welding that doesn't require pressurized gases and its pretty cheap, but you need some practice and either a large power outlet or generator.  

Answer 3

For about $100 and a little practice, you weld up your go cart with a 120V arc welder.