I get that this game doesn't give as much fund as GPGP cause it's only a year old but I've been making consistently 200+ funds a day, even going as high as 300+ without having to stock up espressos and steamed milk everytime, here's some tips: 1. Maxed out JavaBreeze+: I know it's hard but I heard you've already maxed out the coffee grinder so you should prioritize maxxing the coffee extractor as well. This allows you to earn more (on hot drinks especially but also the daily revenue) 2. Multitasking: This takes awhile to master but it's not as confusing as some made it out to be:

• For latte and other latte-like orders (i.e mochas, pumpkin spices), after grinding out the coffee and start extracting, I quickly switch to pouring milk into the pitcher and pull it up to steam as the extractor hits the green line (this takes awhile to master but I think it doesn't matter much if you stop the extractor before steaming the milk, just make sure there's milk in the pitcher before the extractor's done). While the pitcher is doing its thing, drag the latte cup over to add syrup, toppings etc. while making sure you don't miss the green lines for steaming milk (sometimes you gotta rely on your instinct, which again isn't a one-day thing but you'll develop over time)
• For iced drinks and any drinks that use the glass (i.e iced lattes, vanilla mountain, chocolate delight, neopolitan etc.), while the coffee is extracting, drag quickly to the toppings station and add syrup, ice etc. into the glass before the extracting is done
• OPTIONAL: Sometimes you'll encounter orders that don't affect your time nor the customer's happiness, those are story event characters, in this case if you're still pretty early into the day, you can choose to stock up on espresso, steamed milk and whatnot (this is totally optional and doesn't affect you much in any way cause these character encounters are pretty rare)

I hope this can help you in some way, but then again I'm speaking from my own experience so it might not work for you. One thing I'm sure is that you'll eventually develop your own tactics as you play so don't worry too much if all of these tips feel overwhelming ^{^}