Stretching back 3+ years is recreating the world as we know it....Just to find a "Comp". What in our life hasn't changed in 36 months? How can ANYONE spend the time to recreate life and expenses from 2021+/- for a simple 2024 report, 1004 or 1025? How far will you stretch? Calculate the adjustments for EVERY amenity for 3+ years, I had a Lender wanting me to go back 5 years and 50 miles to find a simple adjustment that did not exist anyway (I knew it was a fleeting moment of insanity, that ANY Lender wanting to close a deal would just say "Go back and Find".) It's not our job to go back and find 3-5 year old data to make your deals work. If this is a very complex or limited General Appraiser work, maybe with a large fee and turn time, but Residential? I'll give you all the best 12-24 month data out there, but to surf the net looking for a Comp is insane. You should find another Client.