Others employ a BRRRR method or do wholesale deals/flips to have cash to invest long term. 

Everytime I try to explain my methods to her, she doesn't understand at all what I'm talking about.

Could it be interpreted that way, arguably yes.But if you're going to challenge a law's constitutionality, the reference I provided is perhaps the most common method.

The property is located in Denver's finest neighborhood, and the purchase was financed partly with my savings and a hard money loan that included provisions for construction costs.

This took away the LL capability to not renew lease or, my preferred method, provide large rent increase above market to get rid of less than ideal tenants.  

Consider that on many SFH with the BRRRR method you rent and hope to get a few hundred a month free and clear.

I require all new tenants to use it, but I have a few that use other methods due to them being tenants when I acquired the properties.Background and credit checks are easy to send to an applicant - they pay 55.00 and I get the reports quickly. 

Only thing is other than personal finance, what other methods are there for funding, buy, rehab, rent out and hold type deals.

Plutocratic Politics at it's finest.... 

A lot of mistakes can be made if you do not talk to the right people and use preventive maintenance to avoid problems.Multifamily rentals are a great way to use the more doors more cash flow method.