Finally, after you've exhausted all other sources of fun and excitement you can die and your heirs get the real estate at a "stepped up basis" so the tax goes away with your passing.

I was able to do it from an adjoining unfinished laundry, so I did not have to open the wall.Making sure the lower and upper bath have good ventilation (powerful, working exhaust fan).

Ceramic tile is much tougher and will withstand normal traffic better and therefore longer while being more costly.  

You can, but safety factors on your foundation should be big enough to withstand it. it means increasing from 24" to 36" or 36" to 48".

This includes: Tile, grout, thinset(chosen by client), shower pan liner, drain, tile installation, mud bed for shower floor, bathroom floor, concrete boards for walls, shower faucet and shower head (ORB), seamless glass door. 2- new toilet and hookups 3- double sink vanity white shaker with soft close. 4- granite counter top to match either the kitchen or the tile ( to be chosen by client) this includes a 4 inch granite back splash 5- bathroom package kit ( toilet paper holder, towel ring, towel bar ) ORB 6- exhaust fan 7- double under mount sinks with sink faucets and all hookups.

Needless to say, my amazing wife is EXHAUSTED!!

New shut off valvesNew plugs and switchesNew plug and switch coversNew exhaust fan/ heaterRegister coverBaseboardsMirrorPre-hung doorDoor hardwareDoor stopFlooring The above will be needed for a complete rehab.

Motorcycles must have exhaust muffling comparable to that of a passenger car.

I'd say exhaust all other options before barking up the new construction tree.  

The mortgage note itself is a form of asset protection.Have you implemented and exhausted all the other risk mitigation procedures necessary and available to you?