Well your theory does have basis to it.  

Every day on social media I see families having the move out of houses they have lived in when the property gets sold. 

I wouldn’t rent to individuals who don’t make at least 3x rent (and ideally they’d make more than that as that’s just a floor), I also wouldn’t accept a co-signer who doesn’t make at least 5x rent because they have their own bills and expenses, even if their credit scores check out I’d be concerned about them bringing in enough on a monthly basis to ensure that I was always getting paid, I’d honestly rather my unit be vacant than to rent to unqualified tenants ESPECIALLY in New York where eviction is a nightmare and the state doesn’t care about landlords in the least

Everyday I'm learning something new, I really appreciate it. 

If you want to learn a couple new things, sure, certifications help, but my guess is that for most of us long-time investors and investor-friendly agents, this will be like a DOS version of what we do every day.

The difference is you need to add your holding costs to your basis (unless you can cash flow from one side during the remodel) and be sure you can pay the HM off on the refinance or have a backup plan to put in cash to cover the difference.  

I would actually have to say that this is a case by case basis and if your tenant lease is already ending, there are several peaceful ways to have the tenant move upon the sale of the hone without having to carry the cost of the home for even a month while it sells.

It’s still sales price minus cost basis (in general) is your taxable amount.Remember, investors also develop “land.”  

The basis of house is 52,000.

The market is the basis for each property within that market,  It established the values, rents, cash flow and potential profits.