More things means more hassle and upkeep. You have a limited amount of time.
I've found as I grow older that making due with less can be more peaceful and enjoyable. The less stuff you have to deal with, the more time (and money) you have to spend doing things that actually matter.
The worst thing you can do is aquire a bunch of expensive toys which bring you enjoyment for a short period of time. Which after you're board with the toy.. you either have to sell it, or let it collect dust and take up space.
Mechanical things require maintenance whether you use them or not, and a large house requires a lot of cleaning and expensive repairs over time.
Anytime I think I might want to pursue a new hobby, I try to get the least expensive equipment. Reason being.. I get a taste of it to see if its something that I actually can enjoy long term and if I can.. I'll invest in better equipment.
Its also a good idea to invest as much as you can while you're young. Sports cars will still be around when you reach retirement and you'll have more time and money for them.
I try and keep this in mind. It sound slike we all go through these emotions, some more than others. I guess I need to step back and look at where I've been and where I've come from. It's just depressing at times.