If they do not leave you can lose access to the property.

I would never rely on Zillow's 'Zestimates' of property value as there are too many data points they don't have access to, and also the market is fickle, so no company can track prices with 100% accuracy.

I have contacted the lessee and told him he is in violation of the lease and must stop immediately.

This is the webpage I came up with for access to probate information for Wayne County:https://public.wcpc.us/eservices/search.page.3.3?

And, some of them offer no cost trades upon transfer and cash incentives for transferring accounts.No more fees, no more crappy online experience, no more waiting weeks to access funds from transactions, no more having to request statements or documents, no more M-F 8-5 only hours, no more bad advice.

I'm guessing you have considered this, but one way to get the benefits of rental ownership and still have intermittent access to your property, would be the Air BnB route.

Stop pushing Vegas on people?

@Art MaydanFirstly, if this is a student rental, I would recommend that you have the parents be guarantors and sign a separate guarantee which references the lease {i posted a sample in the BP file space a few years ago}.If the parents are signatories to the lease, then they have all the rights of a tenant including the right of access.  

The following items were checked: Subterranean Termites, Fungus / Dryrot in siding, roof sheathing, Water stains noted at Master bedroom closet, The Subarea below the bedrooms is inaccessible for inspection due to Dirt covering access, Evidence of Subterranean Termites was noted at/in Subarea which appears to extend into inaccessible areas (garage). 

Bigger Pockets is the one stop shop for real estate investing.