⭐ Shop upgrades: cheaper, and each level pays back in about a week
⭐ Thanks @Escanor: a level never cost less than the whole shop, so a bigger shop's upgrade took 2 to 6 weeks to pay back. Now every level is priced from what that shop really makes: about a week to pay back level 2, two weeks for 3 and so on, for every kind of shop. A fuel station's next level is about GH₵ 72k, not 150k. Levels you already bought keep their full value when you sell.
Newer: Pay part of a business loan
Older: Trucks break down less, cost less to fix, and drivers carry on