Not only do you need your business lawyer looking at this but I would strongly advise talking with an experienced tax advisor. One with an aviation based practice.
With all due respect, I think the OP's advice is reversed. My 2 cents: first and only step, GO DIRECTLY TO AN AVIATION ATTORNEY! No business/tax attorney will know about this. I've seen several cases of "legal" advice in the form of lease agreements and/or tax advice from those who are in general practice...and yet they've never even heard of AC 120-12A, FAR 91.23, or
FAA Order 8700.1, Chapter 57. And this is just FAA regs; additional European regulations may apply. Regardless if it's done correctly (legally) or not, you will most likely not run into any problems,
but beware that you are potentially walking through the mine field, and you should be very careful here. It's YOUR certificate.
Having said that, HyFlyer's last sentence is totally correct. You may wish you steered well clear of this episode.
Good luck!