It helps to have little money for this. Works as a sort of safeguard. Doesn't address the core of things, though.
Personally, on average I spend about $1500 a year on equipment, including tubes. And I have maintained this figure for years. I have spend about $6.5k in the last two years, so..unless something breaks and can't be repaired there is nothing I can buy in the next 2.5-3 years. Not that I feel the need. There is a wish but there is no need.