Soon i will go back to Europe and return 3 month later to Thailand.
Before i obtained a single marry visa for 90 days (+ extension 60 day) costs 80 euro
My question is:
Can i apply for a multi marry visa at this moment for 1 year cost 180 euro
Do i still have to leave the country (borderrun ) every 90 days?
If so...do i need a RE-Entree permit?
Because the landborders are not open yet...i ask myself if it is usefull to obtain a Multi entree

Some embassies and official consulates will issue a multiple entry non-o visa based upon marriage to a Thai.

If you got one you would have to leave every 90 days for a new entry unless you applied for a 60 day extension of your stay to visit your wife. Then you would have to leave.

A re-entry permit would only keep the remainder your existing 90 day stay valid when entering the country with it.

Until the land border crossing open a multiple entry non-o is about worthless unless you are traveling on a regular basis for other reasons than getting a new entry.