Gotta love the "rent is cheap" comments. Ultimately you are buying a Condo for someone else by renting it 🤷♂️ if you find a good area that you're happy with, and can get what you want for a decent price, I say buying is better. Some might say that your investment may never go up, but it's you home. The capital will be there and rent saved every month.
once the visa has expired, you cannot get a reentry permit. You'd need a new visa or enter on visa exempt. Your terminology is what is confusing the issue. You cannot get a reentry permit for an expired visa. New visa or visa exempt stamp. Do you now understand? I see you are now talking about the the final entry stamp of 60 days, then the visa is expired. At that point he could leave to the UK and reenter on a visa exempt as there would be no point in getting a reentry permit for a time period less than the 60 days they would get entering by visa exempt 🤷♂️
you cannot reenter once the METV expires, but that's normal for any visa that expires. The OP wants to stay around 6 months before returning to the UK for a short period. If they time the METV correctly, they could return from the UK on the last day of the visa and get the last 60 days from it with no questions asked. I'm really confused what you mean by needing a reentry permit for this visa choice. And yes, it's all about timing.
an METV doesn't require any reentry permit as it is multiple entry already. The OP simply needs to do a border run every 90 days and would not be question at the border as they have a valid visa. The OP states he is required to return to he UK around the 6 month mark, and if timed correctly they could return on the last day of validity and get stamped in for 60 days then extend it for another 30. At that point he would need to choose a different visa for longer stays. But this vi's is definitely better than hopping in and out on visa extensions for 6 months
Depending on where your friend comes from, he could apply for a 6 month multi entry tourist visa. No issues bouncing in and out as it is a proper visa. And it can stretch a stay to nearly 9 months.