""Visit Visa"" on ""Wife's Sponsorship""

First of all am working in Qatar for the last five years for a private company under their sponsorship. My wife is working in HMC as a Staff Nurse (HMC VISA). But unfortunately my company is in a worst condition now due to the shortage of works hence they starts reducing staff & they are not ready to give NOC to anyone. So here comes ma doubts....
1. Can I come back within a week after my exit from Qatar on a visit visa on my wife's sponsorship?
2. As usual after 6 months once the visit visa validity expires is it possible to stay here with my family on any other way (any other type of visa)?
3. or if I have to go back after 6 months when can I come back on another visit visa?
4. One last doubt. Is it possible for my wife to sponsor me after the normal two year ban period?
Please help me to find a solution because if I have to leave permanently it will be a big loss for us in material (a brand new car, brand new households, a flat on a year contract & so).