Play to your strengths and sub out work you feel is too much.
I have just Googled "Restoring a Mini 1275"
An astonishing number of sites with advice sections, Q&A sections and some useful looking "Where to get" tips.
Hard to believe that there are that many people doing it ~ that said one chap in this small village has four 850 minis and one Cooper lined up on his drive, all in various states of restoration. Progress is slow mind you as he has been at it since we moved here 9 years ago ...... but he has fathered three kids in that time so perhaps funding his hobby is difficult.