I’ve been reading a book on futures and derivatives.

The best answer I can give is this: our income is derived from averaging out the various deals we do and that's ok.

For those who bought 30 years ago and have kept their rents up at market rate, who screen carefully to get good tenants, and who are debt free, I would guess it's considerably more.National averages like this are derived from data collected from large property management data bases, not the mom and pop players who own over 70% of the USA's rental real estate. 

@Tom GimerQuick side note: Hague is derived from The Hague, a larger city in The Netherlands.

Your income should derive from how you perform, not by managing people's money especially with only 1 property completed.

Any future financing benefit you derive from this business will still require you to show you full tax returns to the bank.

The Solo 401(k) also has the advantage of being more favorable for real estate investments using debt-financing such as a mortgage - as the 401(k) is exempted from a small tax called UDFI that an IRA would pay on the percentage of income derived from the borrowed money. 

A. 4. (3) - Rental Income from Other Real Estate Holdings:If Rental Income is being derived from the Property being vacated by the Borrower, the Borrower must be relocating to an area more than 100 miles from the Borrower’s current Principal Residence.

The Solo 401(k) also has the advantage of being more favorable for real estate investments using debt-financing such as a mortgage - as the 401(k) is exempted from a small tax called UDFI that an IRA would pay on the percentage of income derived from the borrowed money.So, as you continue your research and get feedback here on BP, think about what type of program will best suit your needs and be sure to ask questions along that line.

If we can derive one thing about Baltimore City from the many posts on the topic, it is that Baltimore is a tremendous value play for rental investors.The question about where to do flips or if a flipping strategy in Baltimore is generally worthwhile is a more interesting evolution of the topic.