If you are going to be away from the boat for eight months a year, and on the boat only 4 months a year, I think you are setting yourself up for all the hassles of boat ownership
without the benefits.
During the month that you are there, you will be getting caught up on maintenance
and dealing with whatever went wrong in the previous two months. Unless you pay someone to take meticulous care of your yacht during your two month absences, you will have a lot of work to do when you spend your next month on board.
I think you would be better off renting
a condo somewhere until you can devote a large portion of your life to the liveaboard
experience and give it a real chance.