I would probably subfloor the entire basement. If the subfloor is sound and you don't need waterproofing, then you don't need Ditra...you would use a backer of your choice. Thin set it down and screw it to the subfloor.
Installing plywood over the entire floor will also eliminate any floor...
Schluter Kerdi board. Great product, but expensive. You might have trouble finding it too. The glue is also costly. In my opinion it's not necessary. If you need a vapor barrier for a steam shower, then you can use traditional construction methods along with Schluter kerdi. If you just need...
I have removed many mud beds in bathrooms. I just removed a 3" thick one last week. Here is your best approach. Get a 7 1/4" circular saw with a diamond blade. Saw the floor into a grid of 2'x2' squares. The circular saw won't cut all the way through, but it will cut deep enough to create weak...
As Inspector said save your money and get a good remodeler. See previous work in person, pictures will never tell you the whole story. Remember you get what you pay for.