LArifleMAN
I have done several screw builds, a couple weld builds, and am now doing some rivet builds. Some of my projects are online on
my project page. I have used the fold-n-weld flats, some pre-bent blanks, and am now using flats bent with a press/jig.
My opinion:
Rivets - building with rivets requires more investment in tools (jigs, etc), but once acquired, is quite easy to do. Probably the easiest as far as technical skills go. The barrel removal/re-install steps are the main added complication, requiring tooling and time (if pin is stuck hard)
Screw - A screw build can be easy and cheaper (tool wise), but can be frustrating if done wrong. Breaking a tap inside a hole can really ruin your day, as can drilling too deep. If you are careful with your tools, though, it goes quite quick and easy. Some remove the barrel to make the tapping easier (much easier).
Welding - Welding is just plain easy and produces and non-standard, clean looking build that is just as tough as your welding is good. Obviously, this requires equipement and skill. Ask anyone who uses a spot welder on the rails how nice that is.
I think that you should just go in the direction that most interests you as far as learning and experiencing this hobby. Things such as existing tools, your current skill level, prior experience, feelings about aesthetics, etc, all play a factor in someones choice.
be safe, have fun