I also understand that the Philadelphia property managers utilized handle all such tenant issues with respect, and issue proper rent credits if warranted, and perform all repairs promptly and professionally for any tenants whom we deeply care about.

With regards to the other case, he is not concerned, since it didn't show up in the title search.Should we be worried about this other case, which the creditor won the case (warrant of debt) against deceased owner, however didn't file an AJ.

But a broken AC does not warrant a night or weekend repairman call.

The will sell some, but not enough to warrant the investment.

It's just a different strategy is warranted if you want the units empty as opposed to keeping good tenants but getting the rates up to market.Since you don't care either way, just craft a professional looking notice of the rent increase and make sure your notice complies with local laws.

All monies paid to Seller shall be retained by Seller as sole liquidated damages.8)COSTS OF IMPROVEMENTS: In the event the Tenant/Buyer exercises the option to purchase set forth in paragraph (4), above, and through no fault of the Tenant/Buyer, the Landlord/Seller fails to convey said property to Tenant/Buyer in accordance with the terms of this Lease/Option, the Tenant/Buyer in addition to any other rights which Tenant/Buyer may have in law or equity for the enforcement of the Tenant/Buyer's option to purchase shall also be entitled to reimbursement for the cost of all repairs, maintenance, and improvements.9)FURTHER ENCUMBRANCES: The Landlord/Seller hereby warrants that the total of the leases, options, mortgages, liens, and any other encumbrances against the property, whether of public record or not, are current, unless otherwise noted, and are as follows:__________________________________________________________________________________________________________________________________10)CONVEYANCE: The Landlord/Seller agrees not to lease to another third party, nor assign, sell, option, transfer, pledge, or otherwise to convey any or all rights or interests had by Landlord/Seller in the property or in this Lease/Option agreement.

There is nothing here to warrant such a thing.  

So what happens when the investor has acquired enough properties that warrants creation of an entity, do they have to pay off all past mortgages at this point?

Is the project warrantable? 

As a short sale listing agent, the advantage of working with the listing agent is that Agent may talk to you directly and determine if your situation warrants the Seller risking their time on your offer.