Hi second,

This is entirely from my, limited, experience.
I would be prepared to pay at least mid 4 figures for a Multi-Domme play party, oranized around "your requirements" that could take possibly a day or more to both orchestrate and execute.
If you give enough leeway to make it a "real" party, instead of the above there might be some space to lower tribute, but that would be up to you.

Lastly, I'm sure I'm preaching to the choir, but, the more flexibility in details and timing you give the "right" Dommes the better it will be for them, and then ultimately, for you.

Po