If I was going to do it, I would grind/etch off the glazing and level the surface with a flexible thinset before moving forward.But I can't envision where I would do this.

If you do not have money or access to it you are going to have to search 10x harder than others for deals.Get out there and do your thing and start grinding.

The only complaint that I've consistently read is that an additional underlayment helps with any noise but I fear that may void the warranties.

Anything is possible but it took me 8 years before I quit my six figure corporate grind job.

Anyway to buffer the street noise?

By far the hardest part about wholesaling is doing the grind everyday.

How is yours in the noise department?

i have 2 bathrooms with fiberglass tub and shower s they are old but but still look ok i want to keep them and just put new doors on them and get this place rentedthe ploblem is when you stand in them they seem to flex and make a slight squeek noise seems kinda flimsey is there and way to bulk them up i was thinking of getting to the undersidethrough the out side acess doors and spraying that foam or something under there to give it some more support ,,, any ideas ?

Sometimes, these people have gone ahead and gotten pets despite what their lease says, other times they're just borrowing a pet from someone else, but I still don't want it in my unit even for a day or two because of smell and noise and bite-risk.

Overall, if its just one room, I'd grind it down and epoxy over it, and have a 10+ year floor for my rental that would look great with area rugs.