Whether that is putting more money down, rent by the room, mid term, short term, etc., there's just no path that I see to get any real month to month cash flow (like actual cash flow, not spreadsheet cash flow). 

While it is cheap money (interest rate is typically set at prime + 1%) the loan must be paid back using amortized payment over a period of 5 years.

@Oliver MartinezAssuming you qualify conventional lenders can do those deals, but the issue is they make practically no money doing small loans sub 100k.

There are other considerations like limits, at-risk money, etc.

Most 2nd position lenders will want the investor to have skin in the game (invest their own money) AND be paid a double-digit return.When you purchase property, you ALWAYS need to have reserves, but in this scenario, you really need to have reserves since you will need to make 2 large debt payments every month.

A lot of new investors think they would be making a lot of money.

Multiple books: The Book on Rental Property; The Book on Investment Property Investing; The Book on Investing in Real Estate with No (and Low) Money Down; Start with Strategy; Real Estate by the Numbers; and Finding and Funding Great Deals.

I am an active investor buying properties cheap good deals all deals must be at least 60% below market for fix N Flips any higher than that I have Zero interest it's no money in the deal.

Usually we have a few thousand dollars each year to invest after we max out these accounts (and it usually just goes into a taxable brokerage account where we use it to buy Berkshire Hathaway or Markel or some other stock that does not pay a dividend).That extra money was actually how we ended up buying this duplex - thought it might be a good way to diversify our investments.I was wondering if I could use net income from our duplex (assuming we have net income, and by net income I mean what we report to the IRS) to fund a solo 401k or some other kind of tax-advantaged plan?

In CA, landlords provide microwave, ove, dish-washer, washing/drying machine and gardening.Let me know what you think.