Get yourself a generally well regarded set of headphones, then look into HTTPS://AUTOEQ.app, and you'll have a great time. You don't have to go ridiculous to get amazing audio.
Honestly, well deserved. The game has gotten far better in the last little while than it was in the beginning and it wasn't just bug fixes.
ActualBudget. If you don't already budget, ActualBudget is a remarkably nice budgeting tool that will change your financial life for the better. actualbudget.com/
I wouldn't try selling services that are hosted on your residential internet connection. What happens when it goes down? Is your setup redundant? Etc.
It's absolutely fantastic! If you read the FAQ for it it even provides instructions on how you can use it to "simulate" other headphones default sound signature on yours which is very neat!