Wow, that much to get a visit visa?

How can we get a salary certificate? My husband is only about too start work. The reason I'm applying for visit visa is so I can travel with my husband and son when my husband leaves for Doha. Both of them are Malaysian citizen. My husband has his work visa, while my son can be given a "VOA" as Malaysia is included in countries given one. I am Filipino so I can't be given a "VOA". But mu husband wants me to travel with him. Is it possible to apply for the visit visa and just give an invitation letter from my husband's employer as the sponsor?