Yes. Re-entering before 20th gives you 90 days

Yes

In Samui the cost of a new wp from a lawyer/accountant starts from 15,000 baht till 18,000.

About your multiple entry Non B visa, you must do a border run to Satun to re-activate it every no more than 90 days: check your current stamp expiry date to know when you must do the next

Even if listed on their website, KL Embassy does not give

Multiple Entry Non B Visa nor

Education Visa.

It dspends on which Immigration office you go.

The rule is that till 45 days is fine. But some offices could tell you to go back later

Better you just fly back and get 30 days visa exempt on arrival, then you extend by 30 days at immigration for 1900 thb. 60 days guaranteed without any troubles

@Kurt ****************

unfortunately it is true, SA citizens, in order to apply tourist visa, must show original confirmed and paid ticket going back to South Africa.

Let me double check with my contact agent in Penang. Where do you live and around when you would apply your visa?

@Ku**

, is the request of flight back to your country a peculiar proof for South African citizens?

Because Penang Consulate, in order to release a Tourist visa, requires house rental contract or hotel booking (at least 2 weeks) AND a reservation/confirmation of an onward ticket within 60 days from the visa issueing date. They don't mind about the destination of flight reservation

Sure.