You are also correct about the possible issues of those steep stairs and other potential violations to current/modern building codes. 

Send notice that they are in violation of the lease.

Code violations, hidden water or fire damage, unpermitted additions, mechanics liens (title company will tell you), encroachments + easements, The BRRRR strategy has glorified finding a dilapidated property, fixing it up and refinancing your money out.

You've probably heard of big Landlords losing property, but only because they were flagrantly violating Fair Housing, running a slum, or otherwise violating the law in an egregious manner.

Make sure it explicitly explains the process for termination if you are unhappy with their services, but especially if they violate the terms of your agreement.3.

In many states with liberal leanings, it may be very difficult to successfully evict based on a lease violation that does not include non-payment. 

If the tenant did not perform the work then he would be in violation of the lease and I could threaten with eviction. 

If they're violating that agreement, you can file a complaint with the Missouri Real Estate Commission: https://pr.mo.gov/realestate-h...

@Koi Turner I completely understand what you are trying to do but there is God Law & Man Law, and you would be in violation of the Man Law...

from  the website:Examples of legal matters that the Clinic is prepared to handle are:Reviewing court documents and other documents related to homeownership, rental disputes, and other housing disputesSeeking damages and specific performances from housing providers due to violations of the lawRepresenting individuals in housing disputes in Michigan courts involving rental issues or homeownership issuesEvaluating and/or filing housing discrimination complaints under federal and state lawFighting the termination of public housing subsidies dues to wrongful allegations or inappropriate cause