On the third hand, if there is a third hand, the number of Airbnb units in Denver is a fraction of a drop in the bucket of total housing supply, so does it actually affect affordable housing?

I not sure if you aware back in 2013/ 14 they changed rules to qualify for whole and fractional investments .

I just know what i heard. 18% was not out of the norm, of course house prices were a fraction then to what they are now, but hey!

The advantage to me is my DRIPs have no commission cost once I buy the initial shares and the DRIPs allow me to buy additional fractional shares.

With a fractional reserve requirement of 10% or lower they suffer massive opportunity costs by the prospects of taking back a property that most likely won't even sell at market value.David's problem was probably cash flow and liquidity.

His IRA custodian should be able to handle fractional interest in real property.The unfortunately reality is that a lot of custodians are not very helpful when it comes to helping you figure out how to actually transact with their accounts.  

This includes fractional ownership interests (tenant-in-common interests), Delaware Statutory Trusts (DSTs), water rights, air rights, mineral rights, certain types of oil and gas investments, etc. 

They do good work at a fraction of the cost of others.  

However, my contractor said he has a guy that can take care of it for a fraction of the price.

Owning a beach front condo in Clearwater is obviously what everyone would want, let me know if you buy one so I have a weekend vacation spot :) However if you do not plan on using it rather often/take advantage of it from a personal standpoint, there are far too many variables when it comes to short-term/vacation rentals to really expect a solid ROI when you can find a traditional cash-flow property which will provide just as good of an ROI with a fraction of the headaches :)