I used to think it is possible, if you've got a lot of spare-time, but not now. Now I think it's almost impossible, because I've recently made a blunder at my job(even when I'm just planning to do a part-time job and have got no kid yet), and think I should pay more attention to this job. And I think getting promotion in one job is more economic and feasible than having a second one.
I wish to know the opinion of you guys on this.
Regards.