This is actually my standard operating procedure when I game, if there's a big money sink I usually offer gold to support it. In the last campaign, even though my Wizard needed a lot of funds to fill their spellbook, I suggested we purchase plate for our Cleric first, so he had it just as we hit level 3. From that point on we really didn't have any immediate use for our gold- the town could only produce potions at a fairly slow rate and we didn't feel that we could really afford to take downtime as the denizens of the local dungeon were up to...something. Pretty soon our money was split between supplies (including whatever consumables we could scrounge and expensive spell components), a vague "buy magic short swords for the Ranger someday when we go to the big city" (lol), and filling my spellbook.
By level 8 the party treasury was sitting at about 30,000 unspent gp and we'd scavenged a few suits of plate and eventually plate +1.