I replaced half of my bathroom floor because it was rotten and there were some soft spot when you would walk in you could feel the floor as if it was about to claps. SO i replaced that part now the other half is beginning to fall apart. What woul be the best thing for me to do replace the entire floor again or just replace the other section that has rotten out. i wanna put ceremic tile on the entire floor so that i want have this problem again. i had a hard time handling the tool to cut the wood what would be the correct tool i would need to cut a whole in the ply wood i only replace the subfloor i couldn't replace the top floor. i just coudn't grip the saw, i don't know if i had the right one or not. Cant afford to call a professional, but i have bought 2 pieces of ply wood and the ceremic and grout do i need and 2x4's to put around the wall or what do i need. thanks for you help