Cashing out plans?? do they work

[Bonafone]

Well the past few months I've been tyring to build my roll and haven't cashed out a dime of my profits. Now that I have a healthy roll (Over 200 buy ins) I want to begin to invest and bring out some spending money for trips and such. I was just wondering if any stt'ers did held a plan like this or if they just cashed out as needed. Heres my plan:

After taxes:

Invest 35% of my monthly winnings
Cashout for spending money 10% along with full rakeback.
Let the rest add up in my Neteller account.