Otherwise, you have to tear it all down and build a new home to current codes and elevations. 

Code in FL, for example, has increased hurricane wind strength from 145mph to 175mph in some areas I know about.And agree, it's all "insurance" weather a policy or not. 

A lot of zoning and town code around short term rentals has been changing as well as in my area, there are a lot of multi-families in single family zoned lots that are “grandfathered” in.

As far as the legality of sober living homes they have a good bit of protection at the federal level from local government discrimination since people in recovery from addiction are a protected class, however some cities and counties have occupancy laws and certain codes that conflict with the sober home model and oftentimes the neighbors are not keen on having one next to them.

I guess that means, there is healthy demand for rents in the metroplex.I am curious if there is a city or few Zip codes within Tulsa, Broken arrow, Bixby, Jenks and Owasso, that is preferred by prospective tenants ? 

The building code will likely differ if this is a mix-use building.

It can be exhausting trying to keep up with all the changes in local ordinances, section 8 (if you employ this strategy) or things that need to happen quickly (code enforcement / vacancies).  

They offer flexibility in design and can be customized to include a business space.Shipping container homes: While trendy, these can be challenging for mixed-use (residential/commercial) purposes due to zoning and building code issues in many areas.

Mesquite is strict on code enforcement not allowing more than 4 unrelated parties to rent the same unit. 

The MEDIAN rents (50% higher, 50% lower) for the entire country are surveyed, collected and posted by HUD on their website www.HUDuser.org by either county or zip code in all 50 states.