Family visit visa mostly for 6 months.you can get reentry by paying fee to immi dept and can return within visa validity.
family resident permit is another job.(like mission to moon)Immigration dept(well labour dept) will check your visa status,your salary certi,supported by bank statement.And your qualification(wife's qualification is plus point)
once lion came to zoo.care taker gave him bananas to eat.lion amazed.
Care taker said what ever are you, your visa status is as monkey.