Georgetown has pretty nice weather. You could get away with less than high-performance.
Mini-split prices aren't going down much.. (Maybe spend.gov is printing money too fast?)
Ductless Mini Split Air Conditioner 9 000 BTU Heat Pump 9000 BTU 3 4 Ton AC | eBay 13 SEER, 9k for $619
20 SEER 12000 BTU Ductless AC Mini Wall Split Air Conditioner Heat Pump | eBay 20 SEER 12k for $1121
With the way things are heading in the world today. Installing mini-splits,
just might be a very good investment.