The home-made tool that's netted the highest cost-savings for me, has gotta be the home-brewed press-fit bearing press I rigged up from the following bits and pieces:
Although I can't take credit for coming up with the idear (
I first heard about it on another forum) I feel I would be remiss if I didn't herald its thrift and effectiveness. I was on the verge of forking over big bucks for a Park Tools one. Successfully installed two PF-30 bottom brackets with it. It's on standby - as I type - for a third build I''m about to embark on in a few weeks.