I didn't as things kind of blew up in my face and STBXWW was unremorseful/NPDish. So I'm running it off credit, unfortunately. I'll be able to pay it back once separation of assets happens - I'm good at budgeting.
But so far I've spent about $5k-7K moving out, and another $6K+ in lawyer fees, and it's only the beginning (plus it's going smoothly). I work, so I'm not counting living expenses.
IANAL, this is just from my experience. But here goes:
When I talked to my therapist he mentioned that in his clients' experience the entire joyful experience costs about $14-18K per person in the couple (so x2 for both of you). That money usually comes off the marital estate one way or another.
In California, from the date of separation all moneys can be assumed to be each others', unless you put it in a joint account. So make sure at a minimum your account has your name only, and if you work, talk to your L about changing your paycheck to a separate account as soon as you file.
Is your H entitled to half? Maybe. But you can ask H to cover legal costs as part of the filing, and pay for the legal costs out of that account. You have to disclose all your accounts as part of your assets and liabilities (again, here in CA) as part of the initial filing. So everything will be out in the open. Don't hide anything, but you'll be allowed to continue using that money for living expenses.
What "enough" means also I think depends on whether you work or not, and whether you're moving out or kicking him out (be prepared for him to not want to leave). Living expenses can quickly eat up that amount, especially if you're the one moving out (in my case, all my furniture is IKEA cheapest available, my cutlery is from the dollar store).
So far in my case we've had close calls, but it's been amicable-ish. I expect things to get really tough on the asset split. We're not there yet but almost.
Can you be a little bit more specific on your case? Your From: Says Germany. How much are living expenses over there?