Eh, at the end of the day, there isnt much reason to have a dedicated base, you are always going to burn up all the more interesting resources nearby and have to move on. Sure you can turtle up and live forever on boiled water and meat chunks doing 3/5s of fuckall with your time, but where is the fun in that.
Modified boxtruck/ambo is the best base imo. Extend the length a tile or 2, add in cookers, beds and the like, armor it up, fill it with batteries, solar panels and cargo carriers and you have a base that will do everything a house can but also do 90 on a clear road.
That said, for a non mobile base, firehouse is pretty damn good, the only issues I have with them is 1) No basement. Having a hulk smash down my house while I was sleeping has only happened to me twice, but it has happened. 2) they often lack water onsite, leading to 3) they are seldom in the best locations.
My checklist for a base goes: Not nearby ants/slimes/fungals etc, has permanent source of water within a map tile or 2, 1 tile wide window to use as entrance, basement for safe sleeping, is either in or on the edge of a reasonable sized town (thats my problem with LMOE shelters, they are always miles from anywhere), bonus points for a nearby computer for reading at night, being a few tiles away from other houses incase of cough random fires, having a road nearby that isnt blocked by wreckage. Back when all you could really do for traps was pits, then I also looked for a few tiles of dirt all around, with caltrops its not an issue now though.