If I buy property with a rehab required it is the day I close the permit or get the U&O. 

Ran across this nice summary of each city in the greater Cleveland area regarding Point of Sale, Occupancy Permits, Inspections, etc.

You would also layout whether each of you would require the consent of the other to sell your share to a third party {or whether that would be permitted at all}; whether each party has first rights if the other decided to sell; and the terms under which one "partner" could sell to the other.  

Is this legal in Baltimore county?  

I would also seek legal counsel in the same area where your property is to find out how you can minimize your fines.

However, as a licensed agent, I legally can only do the deal as myself, an individual, not acting as an agent to anyone; self-representing.  

When opening a boarding home, the city requires you to attain a permit.

Purchase the lease from the Wisconsin Legal Blank website.

Permits, utilities cut off , estimates . 

There is a plethora of vendors available who handle title, site visits, loss mitigation, legal/foreclosure, property preservation and property sales -- all can be directed via phone/email.