I believe these tubs are designed to not require a mud bed under them these days; they primarily displace their load around the edges instead.

All of this cost much less time and money than using lawyers and courts to get an undesirable tenant out.Good luck!

I’m looking at it the same way, I’m not going to bring my family to an undesirable area for their sake, and I look at reducing expenses as a positive, as for at least a first investment moving my money positively is a step forward 

He slapped up one heavy coat of mud without even feathering out or sanding. 

There are lots of youtube videos on how to mud a shower pan. 

If you are constantly on the move or in less than desirable areas I would be hesitant to put my Macbook Air on a moldy/dusty/undesirable counter top but I would have no problem putting my $300-500 laptop on the same counter bc they are easily replaceable just in case something happens.

Atlanta as seen phenomenal growth.BTW the suburbs which were undesirable have also tripled. 

Even the lowest priced house still needs to offer any future resident safety and this area can lead to various very undesirable legal liabilities for the owner/seller.

If he wants the building to demo and redevelop, then he can choose to let his units stay vacant (or put some tenants in - this scenario works either way) and then let the building deteriorate until the other units are undesirable for rentals and devalued for purchases.  

Whatever the occupancy is today you should plan for it to go lower in the first year if there are undesirable residents that you need to cycle out.