As one who has overspent on equipment in the past (and probably the not too distant future) it's not worth the grief to run out of cash. I think we as photographers always have the mindset of "boy, if I had this lens/camera/enlarger I could create all these wonderful photographs." And then once we get the lens/camera/enlarger we decide that we need just one more thing.
It's a form of procrastination, and I am a 20 year offender.
Avedon's entire career was created with a Rolleiflex and an 8x10 camera, both with normal lenses. Two cameras for his entire insane voluminous photographic career. I try to remember that when I'm ho-ing around on Craigslist. :-)