The problem is that maintenance organisations will spread any extra overhead costs over
all their customers - G-reg and N-reg. That is what I have so far found.
Most owners have no option but to use a company, and they all do both G and N.
Only the very few fortunate enough to have a hangar in which they are allowed to do work will be able to get a freelance A&P/IA to do their maintenance. The bigger stuff cannot be done outdoors. I did a 50hr check the other day, wrapped up like an Eskimo, and froze my ***** off in -3C freezing fog
Also the treatment of foreign reg planes in years to come is not known. Some degree of local supervision is likely; this is fine (every decent owner maintains to the regs, and one cannot simply maintain an N-reg to
EASA regs because that would probably breach its airworthiness, among other issues) but the big Q is how much somebody is going to charge for the "oversight"
How much does a Subpart F company charge?