Originally Posted by SPR
Unless the Money is a donation instead of a loan?
Partly correct. Maximising the final cheque to the Charity is the target I'm sure. If the project finally grinds to a halt "for want of a nail" then a cash purchase is necessary. However, the nail seller is taking a "profit" in some form and we know that if we build a RIB ENTIRELY from open market components, it will cost more to build than it is worth.
As I risk sounding like Poly, I'll explain it in my own terms:
If you donate £1000 for an engine, add it to a finished RIB that would fetch £1500 without the engine and finally sell the combo for £2400 then the donated £1000 just became £900. I'm not saying that WOULD happen, just that the math needs to be done beforehand.