always allow the market to tell you how much a home is worth instead of going with what you think a house is worth Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

During one business deal I had 3 different agents in their office taking over the file because of their employee turn over rate.

While BP has a rent estimator as does rentometer.com (both allow a few free uses, I believe), I agree with @Zachary Deal that your best bet is to seek out guidance from either the listing agent or a property manager well-versed with the area. 

Combine that with local agent to "push paperwork" for you and you'll buy the right property. 

Strong property management and careful tenant placement also play a critical role in success here, so I recommend partnering with a turnkey company or an agent who specializes in these areas to make the process smoother.As for rental demand, homes that sit for extended periods are often the result of issues like pricing, condition, or tenant quality—not necessarily a reflection of the market as a whole.

I recently read multifamily millionaire but he doesn't really describe how to run comps on small multifamily other that ask an agent/or BPO's.

Reaching out directly to investors, agents, or property managers can also lead to great opportunities.

When my agent sends a listing, I look at the neighborhood (Mt. 

Last year I bought a rental house but the agent I have does not have any Experience in multifamily properties. 

My son took the prelicensing course to be an agent when I had my team as big as fifty, but since it was online, he was bored, didn't pay that much attention, and didn't take the test.