As far as cash is concerned, not a single red cent! Not of my own, money that is, I leave that to the Fish and Donks out there to give me their's.
I started playing Free-rolls on quite a few sites, and some I carried on playing as I enjoyed the software and feel of a site, never wanting to withdraw money I won, because to me I classed it all as "Virtual Money" and not real Cash.
Time however, if you wanted to measure that into the mix would be hours and hours, maybe Thousands of hours, but when you hit retirement, Time is one of the things I have plenty of, and yet less than most, but it still has little monetary value to me, Some say their time is valuable, but I say Why? because you cannot trade it for material things, and when you die you cannot take it with you, Time can only be spent, so spend it doing what you enjoy, and damn the expense.
Poker is and always will be fun and pleasure for me and all the time I play, is time well spent.
When the fun Stops, STOP!