But the regulator in the waterheater seems broken and I wanted to get quote to fix it.  

And to be perfectly honest I am about half afraid to offer the methods I did before Everything laws and regulations of rest estate investing and Everything else in America is crazy !

As of right now, Airbnb’s are being regulated and as long as you get the proper permits etc, you are in business.   

Once you move out, the duplex will make you twice the income and depending on the city regulations you can Airbnb both units.

@Adam Craig every city is different and they all have their own ordinance rules and regulations.

That being said, FHA has greater regulations and guidelines that the property must meet for it to close.

In other words utilizing the general exemption for private placements costs about $8 - 12K less than using a Regulation D 504 b or c exemption from registration for private placements, but almost no attorney will take a case to sue when the Reg D is properly used, while the general exemption is a magnet for lawsuits.Just for clarification, here’s how it almost always goes.  

Choosing markets that have tight regulations on short-term rentals would mean that there is a higher demand for them.

. - It's big enough to have plenty of traffic but not so big that the competition is really fierce (yet)- Arizonas laws prohibit cities regulating STR (for now)- Property/rent costs are low enough even in popular str areas (near the University and downtown)But I imagine there are similar areas around the country (I know Tulsa is a VERY similar market to Tucson for example.

If the house is on city water, it's possible the water pressure regulator is defective or misadjusted.