Assuming that the glue you're describing is fully cured and bonded well to the subfloor, but just has a tacky feel to the touch, I would probably just install the backer board material over the glue, as long as there are no very high "peaks" in the glue that would cause uneven contact or bond between the plywood subfloor and the backer board.

Then if you go east he prices are insane cause you're moving closer to south Miami (south beach).

I would agree with every thing all previous posters said with the exception of "buy and forget" that can cause issues if the tenant has little respect for real estate and maintenance.

I sold off our investments in 2007 because I knew the fundamentals were being ignored by the gurus and it was only a matter of time before something caused people to see the emperor had no clothes.  

I had a violation caused by minor damage from a tenant.

A bad tenant will cost you money, cause stress and make you wonder why you ever decided to become a landlord.

Of course, you may keep deposit costs, cause tenants ended their lease earlier.

If they are one of the few tenants who do not get confused during this time, this means they have jumped from the Second Month phase into the TESTING PHASE which may cause a few problems, but I will talk about that in a few minutes.To help the Tenants not be confused during the 2ND MONTH PHASE, I always bill my Tenants their rent 10 days before it is due.

If your reasoning is purely financial- Washington DC would be the only place where the return on investment may cause you to consider panels.

"Stuff" hardens when no one is flushing water regularly and this can cause a back up.