-More money robbed from vendors while playing as robber
-Vendors accumulate more money over time the longer they haven't been robbed (set a cap)
-Vendor random event, it'll be announced randomly to all players a set number of times per day that a vendor was spotted with an excessive amount of cash, which would give a nice chunk of money to the next person who robs it [would bring players out of their houses to fight for this large sum ]
This random event idea doesn't necessarily have to involve the vendors but I like the idea of a random event like this occurring once or a few times a day with something that players run to and fight for money/items.