Puerto Vallarta first time pool owner need help!

Hello all. We purchased this house in April 2015 and it comes with my first ever pool so this is all new to me. A short history of the house is the pool area and pool was built approx 10 years ago. After much renovations I have now discovered the pool (4400 gallons cement fully tiled above a garage)is leaking. So we are in process of regrouting and repairing leak. (Btw if you want to start a leak detection business here go for it as there are zero!)
Up until this point I have been paying a pool service approximately $50usd a month to maintain it. I would like to move into maintenance myslef with a friend who can help when I am not here and as well act as a property manager.
I'm not sure if the method bbb will easily done here or not. I first have to get a decent test kit!
Any help ideas and suggestions would be greatly appreciated as I am a little over whelmed
Regards
Gordon