As an investor-focused agent in the Cleveland market I always have my clients write the following contingencies in when buying a house that's tenant occupied:1) Offer contingent on home inspection- usually a 7-10 day contingency period, this contingency allows you to either A) move forward with the deal B) renegotiate the price if issues are found, or C) walk away from the deal2) Offer contingent on appraisal if you're going financing3) Seller to provide copy of current lease agreement4) Seller to provide a rent roll/tenant ledger with proof of payments received5) Seller to provide copies of 3 previous months of any utilities paid by the landlord6) Seller and tenants to fill out Estoppel Certificate.

Once the note is accelerated the seller/buyer either needs to pay off the entire balance within a legally prescribed period of time, renegotiate a satisfactory solution with said lender, or face possible foreclosure filing. 4.

As a seller would you question this and renegotiate a lower percentage of purchase price (3% to listing firm only), or request it is a more even split?

So far so good, I did one year leases with everyone and then when it ended it just went to month to month but I renegotiated the monthly price with the section 8 rep.

Some of the best ones I know started as flippers or also flip themselves and/or have rentals so they understand the risks to buyers and all the aspects that go into it and aren't just locking up deals and renegotiating sellers. 

SO this upcoming July we renegotiate the rent and will be increasing it.

Yes, you could waive the right to terminate/renegotiate any inspection issues below a certain dollar threshold.2.

If a inspection uncovers something hidden, I would still renegotiate or walk away.  1a) I would never buy a condo as an investment for many reasons.  

Once the title search came back, the buyer will not move forward with the closing and keeps wanting to re-negotiate.

At that point, you'll be under contract and could perhaps renegotiate the deal as @Jonathan Greene mentioned.