Find one with an underlayer attached, and if noise is an issue put a sound suppression pad underneath.

Mortar the underneath of the tub ( which is an option in the instuctions).

I guess even if you have the ability to tap into municipal lines, you should checkout the soil conditions to see if conditions are good for a basement or if you have the dreaded shrink/swell soil.  

It was 25 piers that needed to be dug and placed underneath. 

I can tell you all about the engineering properties of soil.

Now, I'm actually laying it starting tomorrow, so in 24 hours I should have more info on it.Personally, I'm curious about how well it lays under slightly uneven flooring (multiple layers of linoleum underneath, not all of which came up.

@Lia Locarnini While researching please keep in mind high TX property taxation as it effects cash flow and that certain locations have foundation issues due to clay soil.

You are looking to trench about 8" wide and 1-2 ft deep, install a lining (lining should cove the trench plus flap it back before the top soil), rock bed at the bottom of the trench (3" thick), place filter fabric (non-woven) around the trench and/or pipe, install a perforated pipe (6" at the most), fill with coarse aggregate (no sand or fines since it will clog the perforated pipe), close the materials with a double lap using the fabric, and then the top 4" top soil, etc, and a small outlet somewhere 10 or beyond away from the pavers that provides positive drainage (no water coming back!)  

It works well for rent by the room because you have one main address with multiple units (aka the rooms) listed underneath it.

I agree with Ray about how being uncomfortable with the drainage running underneath your potential home.