kabayan,send the visa by DHL along with the passport and 2X 2 pictures white backgroud to the QATAR EMBASSY,that's all,no need medical and NBI...

immigration: they will ask your affidavit of support from philippine embassy here in qatar,after getting the affidavit of support send it to your wife through Qpost (EMS)coz more cheaper than DHL...

hope it can help....