To me every generic question like this post, the first response should be an AI response, followed by individuals personal take and experience.OP:Start small and Make Your Big Mistakes Early. 

Since they can't do each property individually, they use comparable sales to make broad generalizations to determine percent changes.

Some other other options to consider that may be easier, would be these: 1) Take your $840k and have a money manager at Vanguard, Fidelity or Schwab invest it in individual bonds at a 4-5% return. 

All complimented with Amazon fulfillment centers, google, and more tech manufacturing jobs.The bad reputation of “Detroit” comes from OOS investors wanting sub $40,000, D class properties in poor condition, because they pencil out to 2-3% deals on paper.

Networking events, seminars, and workshops help you connect with like-minded individuals and mentors.

What i would recommend is joining a REA or other real estate meet-up group where you can connect with other likeminded individuals consistently and share knowledge.

If you are receiving 3-5 per week that’s not bad, considering the price is what most individuals look for when looking to rent.

I actually keep a list our bookkeeping firm recommends based on firms/individuals we and our Clients have had good experiences with as well as I've personally had good experiences with.

I'm invested with individuals who have each put much more cash into the deal than I have, and their only compensations is a fixed percent of total profit. 

I have used LLCs individually for the properties that I've owned and I'm glad I did.