., there is a navy seal saying: How you do anything is how you do everything.  

if you have already started removing, seal the ripped up parts with guardz.

The wood rot is in sections all over, some small, and some more extensive, because the previous owner didn't use the correct size sheets and never sealed seams or nail holes.

Hi @Brendan Seals, It's very difficult to predict how tenants will act, but doing your due diligence and asking for references goes a long way and reduces the risk of having an unpleasant experience with a future tenant.

There are materials that will do this, remove the trim and seal the wood on bottom and sides, then re-apply the trim....

Consider air sealing on the interior?

Does it have a HUD seal?

Saw this in Facebook (from Amazon) ...Fluidmaster 7530P8 Universal Better Than Wax Toilet Seal, Wax-Free Toilet Bowl Gasket Fits Any DrainLooking for anyone who has tried such things and how the experience has been with it ...

I already am paying them for pest control, but they recommended sealing gaps in the home, installing a plastic barrier, and doing a termite chemical service.

Even with tile, you need to seal it if you want it to be water tight.