Easiest way we have found to remove old flooring from a mobile home.

Considering we are just serious about DIY work and are not professional floor installers, we have done floor work so many times in the past! In our own home and in a several rental homes! We got our education from YouTube University and personal trial and error to figure out the best way to do this! I have not seen any videos using a sawzall to clear floor joists, and I'm not sure why... because it has saved LOADS of time and work.