How to Add Ductless Mini-Split AC to an Older Massachusetts House

https://hotel-wiki.win/index.php/DIY_vs._Professional_AC_Installation:_The_Real_Cost

Massachusetts is full of homes built before air conditioning was standard — triple-deckers in Worcester and Lowell, Victorian multifamilies in Cambridge and Somerville, cape-style colonials across the suburbs, and historic capes on the South Shore