If someone were to drop water on the tile in the bathroom it could flow between this gap and down to the 1st floor. 

Is the water mitigation a interior sump with drain tile, cutting out concrete, patching in to match existing, or is it via sump with exterior gravity drain tile.

I put in 100% tile floors in all my places so I can increase my income via pet deposits and fees.  

Hoping to pick up tile for the bathroom as well light fixtures, ceiling fans, vanity and if were lucky flooring. 

I work as a property supplier to a few of these "turn key" companies and while I know of several that overprice "turn key" properties, the companies with which I work do not.

Spent 3 months renovating it - all new LVP, remodeled the kitchen, added tile backsplash and quartz countertops, new paint and baseboard heat units.

New subfloor as old was rottenNew drywall is some spots New Vanity and sink New FlooringNew tile from tub to ceilingNew Toilet New Light All in for $4,800 Only thing that was not complete was painting

My funds (and mental capacity) are absolutely tapped after building the ADU during the pandemic.In 12 years I’ve also updated various things throughout the home unpermitted (bathroom tile, shower valves, vanity, kitchen cabinets) etc..Additionally the floor always had a slope to it, about 3/4” in a 10-15’ span.

I'm not sure they stand outside waiting, but both of those stores are considered "contractor stores" (they carry huges loads of cheaper tile, more rental quality carpet, etc.), so that's where most contractors are. 

Floor in my family room was a DIY tile job by the previous owner and it looks like a DIY.