How many ED visas for language school can one get?

Can I switch from language Ed visa to Muay Thai school Ed visa?

Currently on Thai language school ED Visa probably expiring on 22/23 January 2023.

Looking to stay in Thailand longer due to Thai gf.

Just looking through my options:

1. Muay Thai visa (if it is even possible)

2. University ED (Heard from current language school classmate that it's possible)

3. Exit Thai and do visa exempt + extension (45 + 30) and then repeat

4. Opening a biz with Thai friend and employing myself to get work permit

5. Elite visa (last resort)

Current thoughts

Option 1: not sure if it's even possible

Option 2: gotta check back again with my classmate

Option 3....I know it's not advisable to to live in Thailand under tourist visa exempt and extensions for a prolonged period of time due to old records of student visa + extensions and I might get denied entry after a few times

Option 4: might be even more costly than elite visa and worse.. if biz not doing well then I'll be losing money recurringly

Option 5: literally pay to win lol

Would love to hear some opinions

Much thanks in advance