After more than one year of researching I was lucky to find this wonderful site.
I believe that I have learned enought to start building my own pool. It will be constructed like the one of cancuntom (thanks) whit some diferences. I know is different of how they are constructed now in the US, but I'm confident it will be ok, and I hope this thread be usefull for somebody.
My backyard is small, about 25 x 50 ft, so the pool will be 11 x 20 ft, 4.5 deep, and no way to introduce equipment to do the hardest part (the hole), I started on January 29 working on weekends with two of my boys (They are happy to help) and some hollydays, it took us 2 weeks to do the hole, one more for rebar and pour the slab; then I have the fourth week free from job and built a bench, a kind of entry level and tha walls. I have now just some weekends to work and the building will be slower. Here are some pictures, i hope they help somebody as this site is helping me.