Friends moving out of my house hack, need to replace.

[Justin Ellis]

A year and a half ago I bought my house off campus of my university at 21 years old while still attending school. My monthly mortgage payment is only 500 a month including escrow and utilities are typically around 400 dollars at the most. It is a single-family home, and I have been renting out my two other rooms under the table to friends for the past 7-8 months. One friend pays me 400 a month and the other friend pays me 350 a month. Because this is under the table, I do not have lease agreements or contracts with them to live in my home. They are close friends and they respect our agreement enough to never cause any issues. They actually love the deal they're getting on rent because the house is nice for the area and they pay less rent to me (for more home) than they paid at their previous apartments. 

Both of them have made it aware to me that they are considering moving out within the next few months. Not for personal reasons, but because they are graduating and ready to move on to bigger and better places. I graduate in December as well, but I plan on living in this home for as long as I possibly can because I like the area, and it's incredibly cheap. I would love to find other friends to live with me after they move out because it means I practically live for free collecting rent, but I'm struggling to find friends who would be willing to move in with me in my natural network. Most of my friends are already locked into lease agreements that they like or are graduating soon and will not need a place to live around campus anymore.

This leads me to my question, has anyone had experience with finding and screening potential tenants to share a single-family home within a house hack? Should I even bother trying to find people outside of my natural network to live with, because living with someone I barely know might be too much of a headache? Also, I understand that I would most likely have to create a lease agreement and stop doing things under the table. I can afford the home on my own without friends living with me paying rent, but if I could find someone to live with me I would enjoy the extra income from that and it would be worth sharing my space. I plan on owning this home forever and eventually will turn it into an off-campus student rental once I decide to move out. Should I just start living in the house by myself or try and extend outside of my natural market to find tenants?

I go to The University of Akron in Akron, OH and my house is off-campus if anyone is in the area and would like to connect.