I don't think so.u have to quite this workpermit and the visa, do a new one with the papers of the new school and then do a workpermit again.for the new school
For the amount of money , yes every person, but may be a bank account from your home country or a pension or an income is enough, with a letter from you pr ambassador
U can on,y get 2 visa run by land ....if U take a plane to kl or Laos not problem ...as u fly out it would be easier to get a 50 days tourist visa means 90 days ..and in an do it again ....
Well I used patong language school , perfect in immigration , and the Katy langue a school oposite gasoline station same....all did it Hor me, but u only get 3 month and again .....