I mean I get no one on here would want to watch a bunch of kids for 3 days. But that s definitely not the going rate to watch kids for a short period of time.
300 may be too low for 5 kids, but I can see several young women without any other jobs being happy to play mom for a few days if they knew the kids already for that price.
500 would probably be more in line with what most girls would take and be happy for.