Those are great ideas! And yeah, the more you progress, the more extra money you'll probably have lying around. Having other stuff to spend them on would be great. I might end up doing something like that in the future, or at least something similar. Thank you for the suggestions!
Yes, it doesn't matter how you spend your money (item upgrades), like a more comfortable bed, or cool things, or even outfits :) It's up to you (but I think people like this visual improvement aspect, so yes, it's work). In any case, good luck with your game, no matter what you decide in the future :)