@George Wines, I'll chime in here, but @Mike Wood and NA Beard are right on.As a former city planner in the Front Range, I can think of several legal issues preventing you from condominiumizing a duplex.  

We have the Canadian Condominium Institute which costs a yearly fee...I contacted them anyway.  

Condominium Property Regime ("CPR") specific form of ownership and governing process created when real property becomes a condominium.

I have an opportunity to develop 22 town homes, Tiff district, the city might be to reimburse for infrastructure as well for court yard common area.I have attached the 22 unit layout plus foot print of the try plex, It will be controlled be a condominium association.I have being designing and managing projects for 10 yrs., if I can make this happen it will be my 1st solo act.I’m looking for down seizers or the 50k to 80k earnersIdeals on court yard design, thinking simple and able to have owners us some as gardens, or a small playground.

Protect condominiums, houses and newer buildings from RENT CONTROLProtect your property from expansions in rent control like the notorious LAHD HCIDLA (new LAHD that they changed the name for due to scandals and spending tax dollar money ) REAP Rent Control Housing Authority of the City of Los Angeles HACLA Housing Authority of the City of Los AngelesCASE AGAINST RENT CONTROLhttps://fee.org/articles/the-case-against-rent-control/https://www.economist.com/blogs/economist-explains/2015/08/economist-explains-19

There was a lawsuit in Hawaii where the HOA won an award to repipe an entire high rise condominium because of the yellow brass fitting problem.He suggests contacting an attorney if you have this in your property as remedies may be possible against the manufacturer.

I own a unit in a condominium in Baldwin Co. and noticed that one of the other condo owners hasn't been paying their property taxes.

My family and I own a condominium building and we want to reallocate certain units within the building.

Aternatively, there are some condominiums at the lower sprectrum of the price range that would likely pencil out as a rental.  

Eric,I have to agree with @John Gregg -- While I don't think you'll be able to do everything you mentioned, your idea is definitely possible as I am currently converting a rowhome in Columbia Heights into a condominium building.