Good luck So this prompted me to do some research and @Dan H. is correct on things.

You are correct, most properties list accordingly will have multiple offers in this market.

Neither unit has paid rent and has blocked us from communications.

Be a good communicator and responsive to tenant's reasonable requests.

However, if for example, the company did not install or disconnect the washer and dryer correctly (such as leaving a valve on) while water is turned off prematurely, causing damage, what language do you put in the Lease to also hold other parties accountable such as ALE and appliance install company?   

Asking in the correct forum will get a better response.Read the RULES!

Communication is key

It's a lot easier  logistics wise and the realtor will also probably have better communication with them since it probably wouldn't be their first deal together

This is where you will get the correct estimates. 

Denver Creative Housing, Denver Sublets, Roomies, Roommates, and so on, there are a few good ones)Also, I use Roomies as well because it is a site specific to finding roommate tenants, and there is a huge demand for it as well, so it is a great alternative to fill vacancies for houses if your owners are open to it and you price it correctly.