a. if u want apply family visa in uae for your wife and kids , u need a tenency contract copy municipality approved villa+ electricity bill under your name.if your salry less than 20000 you cant be able to apply residence visa for your parents.
2.abu dhabi industrial area( musaffa).room rent for municipality approved 2 bedroom flat around 60000-70000 dhirham. but if u are looking unauthorized building( no municipality approval) 2 bed room flat with water and electricity between 30000-40000.
3.very easy to get credit card. if u are company listed,then only salary certificate required
credit limit up to your salary.
4. abu dahbi ind area,its very big area,u will get everything better than from qatar(car, furniture food)
5.uae labour law for annual leave is 21 working days(around 30 days).per year
if u facing to get a family visa(only for your wife and kids) ,then visit any typing center people(preffered indian typing center)and ask them to help you (pay around 3000 they will arrange aproved tenency contract
best of luck,