I personally build my cashouts into my moveup threshold, and reward myself for reaching it. This way when I bounce back and forth between levels I'm still being systematically rewarded for good play at the levels I beat.
I'm personally set up in a constant 50 bb shot mode, though in practice I've really just been hanging out at 1/2 until I stick at 2/4.
In my personal
system I move up at 600bb and withdraw 50bb at the same time. I move down at 200 bb, which translates into 400bb of the previous level.
(600bb of level 1 divided by 2 = 300bb of level 2. 300 minus 50bb cashout = 250 bb for level 2)
So, as I bounce back and forth I'm constantly cashing out a little and spending on my computer and motorcycle etc.
I also get good looks at the levels above, and invariably I find that I play a great deal better vs the lower levels when I get beaten back down.
Just my .02