I’d wait till you find out what, if anything, you need to upgrade before falling into the rabbit hole 
I doubt you’ll wear out the toothed belt pulleys, although you could damage them by overtightening the grub screw or other manual actions.
Use the belts from the Carbide store, not Amazon, there’s a looong thread about different belts and how long they last, how much they stretch etc.
There’s a maintenance checklist too which is worth a read, the machine works a lot better with some basic attention.