In short, where I am we simply have to ensure zoning is acceptable, have a surveyor do lot line adjustments and submit new plat for approval.

I work full time in Healthcare IT (software Program Manager - very visible and demanding) so I'm trying to decide whether to pursue a small claims court filing or writing this off as a learning experience on how to deal with inheritied tenants.  

Does your contractor have to submit estimate before loan is issued?

By day I run a Venture backed software company and by night/weekend I invest and rehab income properties, primarily single family but interested in multi-family.  

Don't the buyers have to submit a loan approval letter with the offer?

Have software that can help you with rehab cost estimates if you're interested.

I have made the mistake of submitting an offer of a property sight unseen because the numbers were amazing.

If in an LLC you do need software though.

I had just submitted and offer today for a 3 flat (triplex) we tend to call them that in chicago lol.

You must apply the same criteria to ALL tenants, to avoid discrimination.After you review the application, (submitted when the person said they would, not 5 days later), have them go to a tenant screening service like NTN or Tenant Reports.com and have them pay for the criminal and background check, the credit check, and eviction history.