Interesting, my most recent contract panic/scare was due to my two dogs. My husband is physically unable to care for the dogs (two small min-pins, but he has a serious medical condition). So, this second part of a two gig contract has become complicated by the fact I need to bring both dogs.
So, dog friendly housing.
Plus transporting the dogs, but since my departure date is end of December, there is no really safe way to confirm that it will be above 45 degrees for the dogs to fly below (And they are just a wee bit too big to fly int he cabin.)
This means a way way car rental there, and one way back. Gas. Housing along the way.
The contract became a very sticky thing to discuss - and oddly emotional.
Luckily, once we got all the options out there . . . since they were going to rent me a car for my time out of town anyway, we just added three days to each side of the contract, and rented the car where I lived. We took the money that would have been spent on the transportation to the airport, the airline ticket and shipping (this is an AEA contract) - and gave me a 700.00 travel allowance. (I think I can do it for six hundred, but we shall see.)
It ended up working with in the theatre's budget and worked for me.
I will end up paying the pet deposit at my apartment, but that seems fair.
Sometimes theaters don't want to negotiate this because, once they do it for one person, they feel like they have to do it for everyone - even if there is no cost difference.
But ask, talk, be passionate about your situation. (Some company managers are huge dog/cat people.)