That all depends on the settings, i found the sweet spot to be at the settings currently in the script, which would make the recommended balance about tripple the max bet (max spent would be more accurate) so about 4800 satosh.
10k if you wish to be safe, also if you just want to automatically build up your satoshi by claiming the free satoshi hourly untill you reach your minimum you can always set the stopBefore value at 60 so it will never do more than one run.
Rini thanks for this awesome script!! I´ve just registered to tell u that...i dont have enough satoshis to send ur way. But i will send some whenever i get enough satoshis to claim. keep up the great work!
No worries man, just enjoy the script and if you feel like it you can make a little donation if not, don't. Have fun playing!