On top of that I'm not getting full consent from the current tenant.  

In your lease it should be clear that the tenant is not allowed to make changes to the property without your explicit consent.

If it is unenforceable, then you will need to give the tenant at least two days notice before every entry, and try to get their consent, which the tenant is not allowed to "unreasonably" withhold.

It doesn't make any sense for a lease to renew itself if one of the parties no longer consents. 

In your situation we normally do two things:1) We get the Vendors consent to allow us to try and fill the vacant units prior to Close - no effort on the Vendor's part and any new tenant will have gone through our screening.2) With any tenant we wish to keep and whose rent is significantly below market, we meet with the tenant soon after Close and layout a schedule to raise their rent to within 5% of market over 12 - 18 months.  

They did not have my consent when they painted my house.

https://connect.experian.com/credit-check/landlord-credit-check.htmlBackground check-written into my application is consent to use Wisconsin CCAP info as criteria in making applicant decisions.

I have a tenant who has violated her rental agreement when she moved her 18 year old daughter in without prior consent and added a second pet she is hiding from me when I declined to allow an additional pet.

In this case both property owners need to consent to have the tree removed and becomes a civil matter.

ALTERATION: You may not make alterations or additions, nor install or maintain in the apartment, or any part of the Premises, any fixtures, large appliances, devices, structures, or signs without our written consent.