We set a time for the interview on Tuesday and she asked me my rates today when confirming. I emailed back that the time and place (their home) sounded great, and I listed a range stating it was negotiable.
We discussed that the cleaning/laundry won't be everyday, just picking up as we use things, and that she and her husband would probably end up taking care of dinner most of the time, I might cook something small just for the kids now and then.
I have worked for a couple of families with 4 kids so I know what it can be like, but we won't be dealing with many after school activities to try and get to, just getting them home, snack and homework for the older ones, then out to a park for a bit (there are 2 that are 2 blocks away in different directions) and/or playing at home. I feel confident that I will be able to handle it, otherwise I wouldn't continue on with the process.
If they were all older and had a few different activities to go to throughout the week then I would probably pass on it. One of my previous families had kids that did the same activities so it worked out easily for one person to do it (and they had a large vehicle to use), but the last had kids doing different stuff and some nothing at all (a toddler). But that family also had a personal/household assistant and the mom to help divide up all the duties and get kids places and have someone at home with the ones staying there and starting dinner.