For me a chisel (used carefully) was best to remove the tiles, then a good oscillating tool (my HF&T unit would overheat fairly quickly, but a DeWalt unit would run all day and not overheat ) was then best to remove the residue. There was a lot of moisture damage in this unit that occurred with the previous owner. A very good friend of mine acquired this Monaco a few years ago and I've worked on it off and on for almost three years, on almost everything from cabinetry, fixing the automatic steps, mirrors, lights, door, water heaters, etc. I'm retired so it's been a learning experience, and fun (I have a class B so I thought it would be interesting to work on something different). Anyway, I did the floor demo (i.e., removal of tile and carpet) and replacement of a good portion of the subfloor and flooring (for free). Another good friend of the owner installed the new wood floor (again, for free), and he did an excellent job! Attached are some pics from the job. Good luck! Ernie can confirm it's a lot of work (I need to thank Ernie since I learned a lot from his FB site and pictures - we're pretty close to one another Ernie!).
1998 Monaco Executive Floor Project.pdf