1st husband come - takes atleast 2 weeks for making the resident visa. (For police clearance it takes atleaset 1 week)

2nd wife and kids can come... provided your husband is in good job and earning good salary...

For applying for family visa .. he needs the following:
Company letter, company contract copy, house rental agreement,marriage certificate with attestation, 6 months bank statement... for all these things it takes atleast 2 weeks.
For bank statement - if you r in good posistion then atleast one transaction of bankstatement is ok.

so no point in hurrying.. so ideal send the family home country.. and once everything is over ..then let them come to qatar.
check www.hukoomi. website for all details..
and email me for doubts:amitsen_2000 yahoo.com