But feel it is going to negatively impact landlords by further scrutiny(and new regulations) from the government which will harm tenants on down the road.

What strategies or regulations are there for me to be able to help the seller break away from the previous agreement and make our agreement to legally valid?

The fall started when the city passed its anti STR regulations. 

@Gregory Schwartz I would be afraid that Hardie might break on the radius portion Also Hardie creates silica dust which OSHA now has regulations on how to deal with

They are only going to get more strict. 

While the Springs did recently pass stricter laws on STRs like @Britteny Godar mentioned, they are not oppressive like Denver's STR regulations.

We are doing a BRRRR for first time and would like to know what are regulations around refinance step.Property that we are looking to Buy,Rehab,Rent is a Duplex( Single family home that added an extra Mother In Law Suite with separate entrance later).

The problem isnt lack of money or regulation, its a simple supply and demand issue.

Some of the properties myself and my partner are looking to acquire are sometimes under a strict deadline due to state laws and dealings with “Vacant to Value” homes as well as IRS Opportunity Zone initiatives.  

Just had an AirBNB guest cancel after day 3 of a 30 day booking (we always use strict cancellation policy) because he said he drove by a grocery store 3 blocks away and saw ‘homeless people doing drugs.’The guest called AirBNB and pressured us to lift the strict policy and allow them to cancel for ‘the safety of their family.’A few months ago we had a guest cancel early because they ‘saw someone in the yard at night.’