Give 200$ cash up-front as consultancy fee, against future work.
Before explaining anything about the parts.
Concept is OK. But last time I did that, stainless 1/3 U server housings, CAD/CAM CNC stainless steel metal piercing, bending, threading, & c. it was $6,000, 1/3 up-front, not $200.
MOST of that was to convert my Old Skewl India ink on vellum to a CNC-useable file. Put another way, "setup costs".
Unit cost thereafter was readily amenable to calculation, turned out right attractive.
If a person is serious about "hired R&D" or prep for "pilot production" services?
$200 is more likely to get a "no, thanks!" than not?
WTH - "rich" I am not, yet manage to keep a roofer/handyman/carpenter/renovations guy on $1,000 retainer to assure faster old-age emergency response time than average as to storm damage and such.
So "good thought", Hanermo, CCF (Cash Comes First) can be, but....
Let's suggest that present-day Canada, $1,000 CND is more realistic than $200 CND or even $200 USD. It isn't hand-movement, power bills, tool wear, nor even machine time being hired. It is brains and experience to guide the inexperienced to avoidance of mistakes and optimization for success. Shared success, most shops happy to add repeat biz, batch-mode, of a part they know how to make, and know what the most-recent contribution-margin cost/benefit and risks have been.
And... if the "dream" - whatever it is - cannot justify consumption, not recovery of that up-front leverage?
Buy a used lathe and start chipping away off the back of the usual:
"sweat equity".
Dreams may be "free". Execution to make them a reality? Not so much.
"if, comes.." don't meet payrolls nor utility bills, some independent third-party.