Raul,
Congrats for getting your kids to be with you. The other part sux.
Ken, AKA Blisters, AKA Kate (by me) had a tight budget a while back and became a cheap parts tester of unknown brands and web sites. His discoveries has helped a gazillion of us get more bang for the buck.
I do my best to take his advice with only one small exception-lipos. I'm brand loyal in that area and pay dearly for it. On the bright side, Kate has figured out how to power 12 pound planes for a third of what I would have paid not knowing him. There are also others who spent time and money trying off brand electronics and have found exceptional success.
I have found good success with esc's from
WWW.Lightflight.com. Dirt cheap. Hobby City has dirt cheap esc's also. These are basic esc's and do need to be programmed but it's simple. Hobby City has a programming card for the computer and makes life very simple.
Keep asking questions.
Lou