To run a successfull moulding business you will really have to tack down your market and recurring customers. I have run a sawmill business part time for years, and some years less then others (due to military deployment) and it has hurt my business. I'm now retired and slowly word is getting back out and business flow is increasing. I'm adding shavings for bedding to balance out the ebb and flow of not having a steady flow of sawmill customers. We run feast and famine at the saw. No calls for a week or two then (and it only takes one) several that have us scrambling to catch up.
Shellby: I wouldn't have a machine shop make my moulding knives or heads. I'd go to one of the distributers, guaranteeing balanced knives, corregated heads, and templates. Alternatively with a little patience and a 1/4" grinding wheel you can grind your own patterns (carefull with the balance issues) yourself successfully.
Eric