Would love to know how are you able to get interest rates so low - in the high 3.xx% when 10yr US Treasuries are > 4% and regular property investment interest rates are > 6%.

These reasons are pushed to "the regular people" real world wealthy people I've see don't worry about it.

Only issue I see (I am huge into data for my day job so I run numbers on cities on a regular basis) is that there has been population decrease in last 5 years.

Boulder's superpower is it's politics - they don't allow construction at any magnitude in the city, limiting supply long-term.

hardly, the market does fluctuate here but it's the most dire supply and demand market I've seen (other than some CA beach towns).

It's also about your ability to access the Sponsor's financial and managerial documents on the go so you can control and check what is happening regularly.

Of course, there's no guarantee on what will happen in the next couple of years, but demand continues to outstrip supply.  

I doubt you will have any issue renting it above what a regular multi-family would rent for.  

For illustration purposes the cheaper Delta fixtures most investors purchase at Home Depot or Lowes aren't sold at plumbing supply stores because Delta licenses these less expensive options exclusively to the big box stores (same is true for other manufacturers as well).

That is your best bet to ensure it is watered regularly.