You may not like this one (I’m not a huge fan of running either) but it is free, it is exercise, the endorphins will feel great, and it’s a great way to explore a city! Go for runs through the town or Google good running paths in local parks. It’s really easy to get stuck in a van or get used to sitting on the computer or your phone, which definitely leads to back and neck issues, depression and a general shit mood.
This is just a guideline and there are literally thousands of options out there for each piece of equipment. Do your due diligence and research each piece before you purchase. As with most things, you get what you pay for so if you have the budget, I would splash out on better equipment where possible.