The cost to turn the part into a CAD drawing and then make into a pattern can be $15,000 to $20,000. I did consult with over a dozen companies that do the type of work that I met at PRI in Indy so they know the business. If I take that same part and get a pattern maker to do it the old fashion way it is around $5000-$7000. I agree long term to get it made into a CAD and work with it from there would be great way to begin but a 2 times the price it is not a sound business decision.
-I'm not the last word on reverse engineering to create CAD models but I've been doing this as an engineering contractor for the last 14 years (multiple companies) after leaving my career as a tool and die maker (20 years) for greener pastures. The price you were quoted to create CAD models at 15-20k sounds exorbitantly high. Was a pattern included at that price? Since I haven't seen your part(s) I couldn't say for sure but it sounds almost like:
1) They quoted WAY high because they didn't want/need the work. Lots of engineering/machining firms do this to discourage taking work from the general public. There are several reasons for this I won't go into here.
2) I'll apologize for how this sounds.......they estimated that you were gullible and priced it accordingly. This happens often under the heading of "Whatever The Traffic Will Bear".
I'll acknowledge that I can't possibly know how long it would take to create a CAD model sight unseen but I have a rough idea of how long it takes me to create something and I somewhat doubt your vintage "speed" parts approach the complexity of some of the designs I did on a daily basis.
When it comes to machining a tool path for CNC will need to be made and I got another guy in the same business who has that taken care of already for me.
-Could he not use a probe in the machining center to create an ersatz CAD model that could then cut the pattern/core from whatever material you choose? Lot's of people do. How does he/she intend to create tool paths for parts he doesn't have a pattern for? Sounds like he intends to take data directly from the part itself by probe.
As a sample I'll attach some images of things I've done and none of them took enough time to charge $15-20k (ok the house and factory floor did but there were substantially more components) I'm not trying to solicit business (don't think that's approved of) but I do think you've been quoted high. Do what you think is in your best interests.