To make the job flow easier, but also (mainly) to protect myself if a customer changed their mind later ( which was common).

Besides a mouse trap, another effective way to deal with mice is a cat (if the tenant wants one and the lease allows it).I grew up on a family dairy farm and the barn had grain, which attracted mice.

Be sure to dig into the HOA’s finacials before you buy.Renters: Miami attracts both long-term renters and short-term vacationers.

Mainly how or if you offer them at your STR.

The fact its in a landbank tells me that it was taken back for some reason, which tells me its likely not a high commercial demand for development, but I could be wrong.If it is "on the main drag" in this town then I'd think doing a new build home to do a targeted and intentional air bnb would be the best bet. 

My main focus is Class B and maybe some C+ properties around NE Columbus, as well as outside 270 from the North to the east side.

One main regulation I find in Ontario Residencial Tenancy Act section 134 (3) states you cannot make a profit in subletting.

The advice is to not dismiss an attractive location just because it doesn't cash flow $x dollars or CoC isn't X%.

When you have a VERIFIABLE record of success within specific property types - and typically specific geographical areas, you MAY be able to attract enough passive investment to begin syndicating smaller type deals.  

The main reason is that it is not initially set up for a Real Estate business like other “real estate-specific” accounting software.