4) Can the current owner of the property sell it without involving the tax certificate holder?

At the same time it's currently functioning with no sign of substantial compromise to the cast iron pipe beside the age.  

They said that they get permits as each city requires and that there are too many cities to keep current with every city in the Denver suburbs every year.

I currently house hack with a SFH, but I'm researching ti decide what my next RE project should be based on my preference and market demands.

Or are they going to show you something that has been shown and turned down by all of their current investor clients?

I currently live in New York but I am currently exploring the options of investing in a small multifamily property.

A triplex fully rented out that currently generates an income of 3K.

I currently have a single mom in the property . 

We're assuming we'll remain at or near existing rents for the next few years, and planning on it if our current tenants stay. 

Florida already passed an anti-squatter law and the process is faster and simpler:Under HB 621, a property owner can request law enforcement to immediately remove a squatter from their property if the following conditions are met:The individual has unlawfully entered and remains on the property;The individual has been directed to leave the property by the owner but has not done so; andThe individual is not a current or former tenant in a legal dispute.