Good decision. We only have a few rentals, but they're all in the same retirement community. Our plan is to move in, do the big rehab slowly, then sell off the completely updated property. Lather, rinse, repeat. One of the reasons we have multiple properties is that we don't ever want to displace a great tenant.
I think you are better off than you realize. The houses are your retirement plan. Other than building up fat reserves for future maintenance costs, I think you're in fine shape. Your retirement is fully funded right now. You don't need to be in the stock market.
As long as your properties are in stable neighborhoods, you should be fine. Otherwise, you might consider exchanging them, little by little, into fewer properties in better areas. One fantasy of mine is to buy a 10-12 unit apartment building and fill it with all my single women friends. I'd make one unit into a gathering space and rent the rest out at moderate rates since the goal is creating a safe community and companionship, not necessarily profit. It's a dream, who knows if it will happen?