its very difficult. because there are a lot of fake people. saying they will give you open visa. but they will just take your money and disappear. and also the Pakistani open visa is very expensive. ranging from 35000 to 45000 Q.R. depend upon your relations. and u can better ask in immigration dept about this. but i would suggest company visa to you. because if you want to do a job, then you have to change your sponsorship. so better to try for company visa. you can negotiate with them. and can convince them for release at the time you need