Well, to be honest its not really investing since you'll get a product in return, but yeah I see what you're saying.
For right now its just me doing the design and fabrication. I'd like to keep it that way as long as possible. I think the fact that they're not mass produced is what people really like about it.
If it does somehow get to be more than I can handle, then I guess I'll cross that bridge when I come to it. ;)