II wonder if it would stand up in court that they could force you to use their contractual payment requirements on your own Private property.

In Ohio, the property manager usually can't file the eviction complaint in court unless they're an attorney.

Carlos- the minimum deal size is $500k in proceeds and $100K in tax liability.

Most landlords in Lawrence township now take evictions through Superior court, although that has added costs and is a slower process.  

ALSO, I have not had to do an eviction following a partial payment agreement (so I don't know exactly how that would pan out in our courts), all of my tenants have so far completed their payment agreements as signed.Multifamily Northwest has forms for these types of things available via the Rental Forms Center at https://rentalformscenter.com/ Their forms are typically well reviewed by local attorneys; as you'll note, on the Partial Rent Payment Receipt there is verbiage specifically about if the landlord has/has not served a termination notice and reserving the landlords right to eviction if the agreement is not completed. 

I introduced him to the sponsors, and he proceeded to invest his money and some other money he managed with the sponsors.

If the seller accepts the offer, (contingent on appraisal[as per court approval requirement]), How should i proceed in the situation.

You get a deduction for the contribution, the gains grow tax-free and as long as you use the proceeds for health-related expenses the funds come out tax free as well. 

Once the disaster is over, someone from the lender will verify the structure wasnt damaged and then proceed with the funding. 

But I strongly urge anyone to always get Aldermanic support before proceeding because it makes life--and the entire project / process--a whole lot easier. :)IN SUM: Based on what you've shared, it sounds like you won't need to rezone if you just want to build a duplex.