Hello, I am the mother of three little girls and I have recently move into a mobil home that needs a little work. The floors in my mobil home are beginning to soften in spots. I know that they need to be replaced, but I'm not real sure where to start. I am pretty sure that I can complete this task, but I don't know if I should replace the old wood or just put a new one on top. If I replace the old wood,I don't know what to do about replacing under the walls? If anyone can answer some questions I have plenty. Or tell me about a good book. That is how I learned to hang drywall, kick carpet and run electricial lines.