Use the thick grove trowel for your mortar and back butter the tile.

I normally prefer the LVT products for overall durability with the following caveats: NEVER purchase anything with an overall thickness of 2mm.

The wood is pretty nicked up and cracked so I like the sounds of the thick, filling properties. 

If this is your first deal maybe try and sniff out something a little more profitable in the 'burbs rather than right in the thick of the mayhem?

They measured the outside of the property, so bummer if you have thick walls.

Very thick, sturdy "pads" I can put down on the roof, which would be strong enough to endure any small parties my tenants might throw on this roof-deck area.  

If you have a good base (thick gravel lot) to build on, the slab and building can be bought and erected for $18-20 per square foot.  

Grow a thick skin and budget resources for legal process and property repair while coping with unhappy tenants/owners on their way out.

@Jaysen Medhurst1/2" drywall is standard.   5/8" is the other common thickness and is used when a fire rating (type-x) is needed. 

Being a property manager, while a good addition to one credentials, is nowhere near the same as being an experienced owner/operator of a particular type of real estate property.Further, having raised money for a fix and flip is not the experience outside investors look for from sponsors/syndicators they invest with.While the terms suggested by the OP may have been obtainable by some sponsors in the "old days", i.e. before on line real estate crowdfunding, and while there maybe some out of touch ATTEMPTS currently to sell a program under these terms, I don't believe anyone would be so naive or thick as to invest in it.But, that being said, the OP has another problem in attempting to sponsor a deal under the terms outlined.