The first thing that popped out on this post was that the homes were "paid in full"
This is GREAT but it tells me that you're not fully leveraging how the market works. What I mean by that statement is that our system is built on leveraging financing to expand your cash flow. We are in a "fractional reserve banking" system, why not take advantage of it?
Find an outstanding mortgage broker (not banker, I have great referrals) and use the equity to purchase other income properties. Just make sure that the expenses, fees and vacancy rate of 25% will still leave you with a positive monthly cash flow. If it does you can do a hundred of those deals and that is how you gain true wealth.
Also keep in mind that a lender will count the income of a property towards your personal income with financing. It might be better to leverage a multi-unit instead of just a single unit. Residential lenders will loan on up to 4 unit properties. 5 or more units are considered commercial but can be a great investment if the numbers add up.