Why would you want to recreate it?
I'm quite the C64 fan, for me it was one of the first real "homecomputers" which I owned and I sure spend years on it. It was awesome. As such it should be no surprise that I have several models lying around the house; the new "flat" design with the new SID chip, two or three of the old "bread basket" models, datasette, 1541, etc.
But the thing is; in my opinion nothing beats the original. That's also one of the reasons why I also got some older models apart from my "new" flat model. An opinion backed by others it seems when focussing on the flaws which were in the design.
The reason I'm questioning all this is because there doesn't seem to be a shortage or anything if you want to get one yourself. When I check out "Marktplaats", a Dutch trading website comparable to eBay, then I get approx. 150 results when looking for the Commodore 64 (link to Marktplaats.nl search results). E 75,- for the machine and several games, right down to the print plate, advertisement for a repair serivce, joysticks, the VIC20, the original matrix printer, etc, etc.
When checking the international eBay website I get almost 4000 different results.
So looking at the fund raising idea from within this context I have to agree with the harsh verdicts. My personal take on this is simple: Why would you want to recreate it when there's still so much original material available out there?
If you want a C64 yourself al you have to do is check the wanted advertisements, choose and pick one up.
Nothing beats the original in my opinion.