How did you met him and how is this happening . . . ?
Be careful in dealing such cases as your story is very scaring to me; both of you not in qatar and not working and want to marry in qatar and why not in Philippines ? Check with your local embassy in qatar first for the marriage formalities before entering qatar and deciding.
He is not employed and cannot support you and still what is making you decide to marry him. What do you feel you dont love your first husband? Dont fall into a stupid situation where you may repent. To me you seriously need counseling.
Yes! there are many marriages like this in qatar and double/triple then that are frauds and beak-ups ?
Moreover are you going to change yourselves a muslim and marry him ?