I think what you are describing is essentially a data center Build to suit perhaps? 

Especially if the other kids follow suit, they'll likely need some kind of housing for a significant period of time nearby so buying now wouldn't be the worst move.Just my 2 cents.

It is not going to be cost-effective to run a vent for a dryer.

A generic program can’t be tweaked enough to make it effective for any particular deep niche.  

I added a bedroom to my two bedroom suite due to high demand last year. 

Then you add the compounding effect of hurricane Dorian and it was crickets.

Which is more cost effective/efficient. 

But if your looking to cash flow like $500 or more per month you might want to look into more cost effective markets where you can purchase a property very cheap and the rents will give you that type of cash flow your looking for.

All these will effect long term appreciation and rents.  

Here is the source for the commission rate, right from the Sitzler NAR lawsuit judgement (bold text added):"In addition to training, Plaintiffs have presented expert testimony showing that Section 2-G-1 had the effect of stabilizing commission rates.