Regulations are complicated, see: EPA on UST's 

And this will allow you to use that same HELOC for the next one -- recycling is good for the environment, right?

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

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.

They are always looking for stories of local businesses trying to reopen and survive this environment.