Bear in mind that I'm not interested in flipping or extensive rehabs, so I'm in a particular niche. 

And if they do expire, what would I need to do to get an extension?

My advice would to find some more extensive projects and get those rolling through the winter and have them ready to go in January/February/March. 

2 - Is it common for the RE agent representing the buyer/seller to be anxious and annoying during this process when continuing to request extensions?

Do CODE VIOLATION SEARCH.9Calculate MAX Bid PriceOnce the properties are filtered with the above criteria, set the max bid price between 60% and 75% of Fair Market Value or ARV10Bid StrategyDetermine the low starting and maximum bidding amount, to be agreed by GENERAL PARTNERS11BiddingEnsure 5% of max bid price is in County bidding bank account 3 days prior to bidding12Property Win BidEnsure funds are wired to County bank within 24 hours of WIN13Send File to Lawyer/Title SearchIf property is still occupied, have Legal file a “Writ of Possession” to get former owner removed, Perform Extensive Title Review, Negotiate any existing Liens14Receive TitleReceipt of Certificate of Purchase, Certificate of Title to occur within 3-4 weeks from date of winning Bid, continue follow up with County until received

I purchased a townhouse at auction (last year) and did an extensive update. 

I have looked into this extensively and 1 point that has not been discussed is the personal guarantee that is typically given on commercial loans.

I was born and raised in Marietta (East Cobb) and have extensive knowledge of the schools, neighborhoods, areas, etc.

I've really only seen these kinds of numbers with an Agency SBL program, on a borrower with extensive multifamily experience, in a primary or secondary market. 

The scope of work is rather extensive.