Frame Building Market Research

Momentum I'm not trying to be a dick, but haven't you only built the one frame so far? If it was me then I'd build a few more for people at cost to build skills and get feedback from riders before building for profit.

Plus remember if you are selling the frame you will need insurance as well which will mean a big initial outlay. Not saying you will not beabe to do it one step at a time.

I am not 100% on this but I think that there are regulations regarding Acetylene and where you can have it. You might be of with the porta packs but the big bottles I think have restrictions. This would be hard to get round because of the gas supplies (main one in the uk is BOC). I know you can use propane / oxy mix for lugged construction so if you are not doing fillet brazing you'll be fine, but I am sure you already know all about that side of things, just wanted to mention the possible acetylene restriction problems.