Hey Pete! The problem you're having must be common, the very first haunt I ever volunteered at had an asbestos problem with the piping.
My dads a plumber and pipefitter and he has to deal with this kind of stuff all the time. When he takes out older pipes with asbestos he just wore a breathing mask and such. It doesn't seem to be too much of an issue. Our house had tiles in it (they weren't asbestos) but they were easy to remove when we remodeled. They were old hospital tiles. (long story.)
My moms a real estate agent who's right next to me and she says it has to be removed professionally.
So I guess this is a cruddy reply, I can say from experience that it is easy to remove, but I guess it has to be done professionally. So it shouldn't be too expensive.
...that reply went everywhere. I'm sorry. I'm still kind of new at writing replies on here haha.