document requires

1 salary letter from husband company
2 last 6 months salary statement
3 salary should be greater QR 4000/4500..not sure
4 marriage certificate
5 water/ electricity bill copies

i think above 5 documents are enough for transfering visit to husband sponsor.

expense..

200 rial for transafer from visit to resident visa
500 rials for 1 year visa stambing
100 rial for medical testing (may be u already paid but again u have to pay for changing from visit to permenant visa..)

last week only i got the permanant visa.
Good luck for you....