You are borrowing additional money from the bank with this property as collateral.

@Mark Allen thanks for adding that additional perspective. 

From an investment standpoint, the town of Telluride has put in a concerted effort to make it both a summer and winter destination with 2 world renowned film festivals in addition to bluegrass, jazz, blues and brews, wine and car lovers festivals filling up the summer calendar. 

So this means an additional $100 is due per month.

Taking on a tenant not only resets the clock but opens up the door to additional abuses and losses incurred by you.

@Amanda Fabian seeing that you already own your place, I think STR could provide some additional income. 

In addition I agree with @Karen O. and @Michael plaks as well- any way you go. 

Additional 400 sq. ft. storage in shed detached from units.

We are very upfront with banks from the beginning to make sure they are okay with additional liens, and if they are not we move on to other banks because there are plenty that are.Now, there is a difference between buying with little to no money down because you decide to vs because you have to. 

From my experience at least from my distributor here in NY, the oxygen barrier pex Ive purchased was grey and dull in color, the pex required by id say most buildings codes for heating will be the oxygen barrier tubing, which will have an additional barrier inside the tubing, I know the pex ive used had markings on the tubing every few feet.