I’m in the process of selling off 3 of my 5 vehicles and buying one new to me. We have a ‘25 Land Cruiser for the business, I just bought a ridiculously priced ‘05 Power Wagon for towing, dump runs, hunting, fishing, and I have a 1963 VW Manx clone for when I want to waste time spinning wrenches. I’m selling my Sequoia, Tacoma and Bronco. I have an acre of land to keep them on, but it’s ridiculous. Insurance, maintenance etc is just wasted on the 3 extras.
OP, unless one of your vehicles is dying, I don’t see much need for you to downsize. Although, the F150 and Expedition seem to have a lot of overlap in my eyes. Unless your wife needs a non beater for the weekends when you are not using the Viberator, you could morph both the Fords into a newer/nicer F150 if you don’t “need“ the suv part of the Expedition. An F150 with a canopy/topper/toneau etc would do everything except carry more than 5 people.