Setting house rules when you have roommates

[Tavis Stice]

Needing a little guidance.  I partnered with my son to purchase a house hack for my son while he attends college.  We found a good house with 5 bedrooms about 10 minutes away from his university. Financially, it’s working out great as he has 3 roommates that cover the mortgage and repairs with hopes of picking up a 4th roommate.  The challenge that we are running into is general house chores and cleanliness.  Probably should have foreseen this with all the college boys.  Has anyone successfully managed this?  Is there a template of house rules I could borrow?  How can we hold them to their responsibilities?  Thanks to all those that can reply 🙏