What i would do in your situation is, i would have it under an AOC and get a CAMO for the continuing airworthiness and maintainance programes , and take care of the maintainance on my own using my B2 license ,or have my own commander license to do the minor maintaince and get a 145 organization to take care of the major maintainance tasks , if you can afford it you can establish your own part 145 organization but its not worth it if its for one aircraft only .