That is a HUGE undertaking. A transom, stringers, deck and motor removal/re-installation can take a long time and that is when you have electrical power and tools on hand. If you are talking about the 1981 22' boat you own with a 470 motor you might want to re-look at it.......... it might not be worth it.
Your boat has fiberglass stringers .......... are they broken? Replacing them will be a monumental project.
Is the decking soft? What is wrong with the transom?
You would be better served repowering with a 3.0 liter or a 4.3 and get rid of the source of most of the problems.
I would look into renting a garage or paying someone to use their yard ......I doubt a marina would be too cooperative with a full rebuild.
All the supplies can be had here on iboats for a deck/transom repair.
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