Song of the Ages
This will be a relatively low fantasy and low gold campaign.
Magic items are rare, and considered priceless, so you will be unable to buy and sell most magic items, with the exceptions of low-level scrolls and potions.
You will need to pay for lifestyle, especially during downtime. This simplifies cost for food and shelter, and will be a common sink for your funds, since your adventuring is a life, not just something you do for fun.
Mundane gear that you find on enemies is not resellable. You can still loot bodies for coins, gems and the occasional magic item, but the wear, tear, bloodstains and fit makes most armor and weapons not worth looting from your enemies.