If you came here you'd be staying in a motel along with all the other undesirable people. 

College areas tend to have a steep gradiant between prime locations and undesirable ones.

This will be the work surface on the dirt so we don't get stuck or track mud onto the street.Have some more water items that we are getting quotes on and discussing with the engineer.

Furthermore, HELOC loans' popularity may also stem from their having a better image than a "second mortgage," a term which can more directly imply an undesirable level of debt.[5] However, within the lending industry itself, a HELOC is categorized as a second mortgage.Because the underlying collateral of a home equity line of credit is the home, failure to repay the loan or meet loan requirements may result in foreclosure.

By that I mean a tenant who moves other people in, disturbs the neighbors or the city, has unauthorized pets or otherwise behaves in an undesirable but difficult to prove way.  

Recently  I have had two undesirable prospective tenant applicants flash cash before my eyes in an effort to get me to take them as tenants.

These checks are to protect you from undesirables - undesireables can be in the form of students too.

Secondly, this is not a job you want to do if you have tenents occupying a property. you need to remove the drywall, install roxul and rehang drywall, tape and mud and finally paint to finish it off.

The best you can do is check all the visible areas possible for any evidence of them that may still be present (i.e. mud tubes, etc).

It sounds like your ad didn't set expectations (no evictions, no criminal history, etc.) of the tenant, so lots of undesirable candidates may be responding.