Yes, although abused a bit, the old ed visa length was good for serious wanting to study . .

It seems advanced Thai, ป6 exam etc are now not possible under ed visa - as not enough time allowed -

I finished a few years ago,

I know things have changed re visa.

Are you looking for ed visa or learning a language.

ProLanguage run Chinese courses

(Personally I only learnt Thai 4 yrs and Japanese with them)

The school is MoE approved.

For me (and at the time + finished a few years ago) they were a good school)

Pro Language School Bangkok

10th Floor,Times Square Building Rd., Klongtoey,, Sukhumvit Rd, Khwaeng Khlong Toei, Khet Khlong Toei, Krung Thep Maha Nakhon

02 250 0072

Plus a handling fee . .

I believe technically no limit at airports - but if a lot expect an interview - IO may recommend you get a proper visa

Visa exempt entries now limited to 2 land border crossings per year.

Yes

At SUV' the desk is in a corner of the immigration hall. Get the re-entry after check-in but before going thru passport control / immigration