We are planning to lease an apartment for STR Airbnb in Denver next month, but we researched on Denver that is very strict to allow only one primary residence. 

Navigating the Nashville STR market has been interesting so far due to the regulation and having to keep the zoning in mind.

Each island (key) has its own specific STR rules and regulations.

Owner/occupants also have the option to make their buildings "active" and use the large losses created by cost segregation and compliance with the Tangible Property Regulations against the business income.

Does anyone know the rules & regulations surrounding short term rentals in Douglas County, CO and if they are strict to enforce any such rules?   

Charleston has very strict zoning rules around Airbnb. 

~CurtisCurtis, If you are looking for strictly cash flow I would look at MF to try and max out your cash flow and keep your closing cost low from purchasing multiple units under one loan.

It is a rare break in favor of individuals in an overly regulated state. 

Am I able to use the FHA loan for a commercial property or is it strictly for under 5 unit properties. 

Of course, ask for references.One of the reasons foreigners purchase property in Japan is that there are currently no laws or regulations prohibiting the purchase of real estate by foreigners.