Is there a way to permanently increase a town's cash reserves?

[Alessandro Silva]

All of the towns in this game are way too broke and poor and never are able to afford buying out the full cargo delivery of a large caravan. Is there a way to permanently make a town wealthier so that it has more money and therefore becomes able to buy all my goods?

[AccelToWinYT]

Try sticking in more people. It kinda works but then you'll need more food.

[Kai-L Kenobi]

ive never played the story but in sandbox, this is because other caravans have just beaten you there

[AFTERBIRTHTACO]

I've done a fair amount of testing with this, the amount of any good being bought seems to be related to town wealth, i have towns with 100 people that buys more of a good without devaluing it than towns with 200.
The easiest way to increase town wealth is increasing employment at any job, this increases the wealth a little, amounts vary for each industry. selling industry back to the towns is the best, i did this with food and forage, the better the monopoly the more it increases, i sold a whole monopoly once wealth increased equivalent to the value of industry but the next day it increased dramatically again.

The goods towns consume from the time you leave till you return is important, cement or medicine are both good for this with high profit items that towns consume rapidly, when a town buys cement it invests that 3.5k and sell it for say 4.5k they pocket the profit, so a variety of high profit goods that sell well for you and the town. Leather jackets and vests aren't as good the consumption rates aren't crazy, but fantastic product highly recommended towns buys loads of them without the prices dropping to low.

I'm still playing this campaign and may update with further results