After reading thisb thread from page one all the way thru, it seems the average is around 70-200.
Those the are in the 1000-2000 range are either commercial growers (even if it's a partial income), or just nuts.
I`m at the 100 mark and have been growing since may of 2008 (not quite 2 years). I can prolly handle another 100 or 2, but that's it...
Seriously though, being in south Florida, and buying approx 1 a week, in ten years I'd have 520, not including dividing some up.