I was going to suggest the same thing as @Kyle A. Isaacs.
I have been using a different combination. Instead of rent by the room, which seems very hands-on, have you considered doing short term rentals using a property management company?
I'm not sure about your area, but in Fayetteville, we have someone that stages the properties and then a short term rental property manager that manages everything.
We purchase foreclosures and wholesale deals mostly to get value add properties. We are doing this with two right now. Once the 6 month seasoning period is up we are going to use a commercial portfolio loan to do a cash-out refi. We plan do groups of at least 2 but hopefully more properties at a time so the season period is up around the same time. Then refi and repeat. The refi will have to be done in an LLC and the interest rate will be higher since it is a commercial loan. It is based on the deal and not on the persons credit and income.
I am happy to answer any questions you might have!