Subject To's Legal In New Mexico? Please Help!

[Jesse Ramirez]

Hello everybody, I'm relatively new to real estate investing and have found a spec builder who is willing to let me take over his mortgage/note on the home with some cash flow for himself. Im from Texas and know lease option and subject to's are considered illegal. Can I use these options in New Mexico? Legal or not?
Also, if so how do i go about the contract? Where do I find one and which one do I use? I'm not gifted financially yet so it must not take very much money. Thanks for all your help.
Jesse