I'd look for a welding class locally. If you already know how to align frames, etc. the only other thing you need - at least to get started on your own - is to be able to cut and weld metal.
Know what you mean about the cheap bike sin Holland. My wife's Aunt and Uncle live in Delft. They have no car and use bikes and trains exclusively for transportation. So do a lot of other people they know. When I visited them I was just shocked how crappy all the bikes were! You'd think if you were going to forgo dropping $30,000 on a car you'd want to spend more than 100 bucks for a bike!