Regarding early termination of the lease agreement our lease states "Any notice to terminate this tenancy must comply with the applicable legislation of the State ofMissouri (the "Act")."

@DeJarian Dickson Graham, since you mention no running water you may also have the possibility of having them out immediately by going to the local code enforcement office and seeing if they will declare the unit uninhabitable because of the lack of water. 

I want to keep the tenant, enforce the rules in their current lease, and make the transition to me as the new owner as simple as possible. 

I currently work in law enforcement but have a passion for real estate investing and would love to have a job where I can gain more knowledge and experience in this particular area.

Maybe when legislators find out there isn't enough affordable housing provided by landlords they will realize what a big mistake they have made.I'll take a guess that this in in California where businesses are being forced to close their doors because they can't afford the high cost minimum wage and also can't afford automation products either.

The contract does not have to state how it will be enforced to be enforceable.

Verbal contracts can be binding (but hard to enforce), but not in real estate. 

If they are VERY professional, they will have their processes in writing as verification that it is enforced equally and fairly by their entire staff.6.

I also owned condos where there was an HOA and they are quite strict enforcing rules so something you planned to do won't fly either.

Pick how much is acceptable (3x monthly rent is standard) and enforce that.Once you have your criteria, the applicant you approve is the first one who applied who meets it.