Help with Bankroll

Ok, so I have read loads of articles about how big your bankroll should be to sit regularly at certain games. However, I want to run a mix of games to get the best out of my game and keep me sharp.

I was wondering what size bankroll people would recommend for this schedule per week:

50 $5+1 SnG's on Party
1 £20 Tournament at Gutshot (Live FO)
3-5hrs at the 25-50 at Gutshot (Live Cash)
10hrs a week at the 0.10/0.25 6max tables at Party

Plus another $100 a week in entries to other tournaments (online and offline).

I was thinking a starting roll of around £500 or around $1000

Is this way off? What do you guys/girls think?