Best mod for increasing valuable spawn amount?

Heyo! I'll keep it pretty straight forward, I've soloed up to level 40 on my singleplayer run, however its getting incredibly boring gathering roughly $280,000 every round, where the value and quantity of valuables never go up.

For more challenge, I want to increase the spawn rate of valuables. Lets say for example the map spawns in 30 items by default, I want it to spawn 60+ items instead.

There is already a mod out there that does remove the limit, however, you can make no adjustment on it. Either you have vanilla spawn count, or the limit is removed entirely, so you have a 20 fps map with so many items you can't realistically extract almost any of it to reach the budget.

Anybody got any suggestions?