Unfortunately, there really is no "standard" arrangement for this situation. Normally, the payment of specific fees would be detailed in the appropriate document, such as a final judgment of dissolution of marriage or an order for temporary relief. Short of that, this is, to some extent, left to the discretion of the parties.
Do you have attorneys? If so, perhaps they an work out a reasonable solution. If not, then this task would be left to the two of you. If so, you have a few things you can use to assist in the negotiation. First, as you've suggested, there is some tax incentive for your husband. Additionally, any monies paid could be used as an off-set for future disbursements, if deemed appropriate. Further, you could offer to provide him a greater portion of the proceeds from the sale of the home.
This can be a complicated issue, please let me know if anything needs clarification.
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