What are the best visa options for staying three months in Thailand if I'm married to a Thai citizen but separated?

tourist visas for thailand are sold two ways

SETV <- single entry tourist visa (you have 90 days from the date you buy the visa to enter thailand ONCE and get stamped in for 60 days)

METV <- multi-entry tourist visa (you have 6 months from the date you buy the visa to enter thailand as much as you want and each time you get stamped in for 60 days)

Just get the SETV plus a 30 day extention of stay, that gives you 90 days in Thailand

Just get a 2 month tourist visa and extend 30 days while here. As easy as it gets

multi entry tourist visa or single entry and an extension of 30 days