My realtor doesnt recommend buying this due to special assement unknown and HOA runs badly. 

If you were in my shoes, what real estate strategy would you recommend for scaling quickly (but smartly) so that I can replace a good portion of the W2 income from real estate investing?

I’d recommend focusing on building connections in Denver, exploring local markets, and considering strategies like house hacking or buy-and-hold investments to help you reach your goal of becoming a millionaire by 2027.Good luck!

I would recommend you and your husband get on the same page about future investing goals.

My recommendation would be to get approved as a Landlord, contact the director's office and request that an inspection be completed before a tenant is selected (sometimes they will do this as long as you select a tenant within 14 days - which you want anyways), and have an online application and screening resource in place.  

What is your recommendation ? 

I will definitely look into the books you recommended.

Now my main issue is I need a fire detection system in a enclosed back porch that leads up to all three floors, but I don't know what's the minimum I would need to be compliant or that the fire marshall is suggesting what he wants or recommends.

Any recommendations on real estate investing course or classes? 

Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?