How much time does it take to convert your car using the Gas 4 Free method?

My husband has so many projects he would like to do around the house and the yard, and he just doesn’t have too much time to actually do them.  He just mentioned that he was interested in getting the Gas 4 Free conversion instructions to try with his car, and I am wondering if he would even have the time to do it. How much time does it take to get the necessary parts and actually set up the conversion system? Can anyone tell me where I might be able to find a gas 4 free review that would tell me more about this?