Nobody but a handful people in this game fit their ships with things they loot from NPCs. And no market hub is more than ~15 minutes away from wherever you are. Learn how to use wormholes and filaments for traveling around. Build yourself a good fit and then bring the ship to wherever you want, do the stuff you want.
If you want supplies locally, create a fallback cache on an NPC station. Or join a group that lives there. Or drop own infrastructure if you are strong enough to hold it.
If you really really really want to play some kind of “solo-selffound EVE”, the SoCT ships are for you: Sunesis, Metamorphosis, Gnosis, Praxis. They have boni to all weapon systems so you can fit on them whatever you find and get an acceptable performance.
Your idea has way too deep consequences for the overall ship balance for way too few benefits (aka close to zero).