Hello kabayan, nagpamedical ka naba , if they give you a fit for work certificate then you can come here in Doha. She can sponsor you if she have an adequate salary to support you and your daughter. When you find a job, you should be transferring the sponsorship of your kids to you but should have the minimum salary required. You can come by visit visa under her sponsorship as long as she or you have the same family name. To minimize her of going here and there, there is an agency i know that process the papers in good fee. PM me and i will give you my number or tell your wife to PM me. In agency they just need the passport copy and support letter from Embassy..

"There's nothing we can do to change the past, if it teaches  you a lesson profit from it then, forget it."