^^ I agree with everything this guy says (at least in this case ). Start small, see if you really enjoy it before sinking hundreds/thousands into the parts and tools needed to build something like a beta22/dyna.
I also share the sentiment that the beta²² has an unacceptably high failure rate. I haven't built one in years and I know that Ti has changed some part values to make it more robust but I haven't stayed in touch enough with those building them enough to know how much of a difference it has made.