Silver lining: You have the widest pool of potential parents of classmates for friends/carpool buddies/can you tell us what the homework was/etc.
I would ask for a group conference soon and sit down with all four of the teachers and ask for some consideration/assistance on things like snack supply, fundraisers, field trip cost assistance, and communication.
It can be overwhelming to get the "fill out these 101 forms, have your child complete this project (which mom does most of) and sell ten items to qualify for the piece of junk prize they have every kid in the school drooling for." Also, the PTA or the school itself has funds to support families where the "extras" create hardship. I can't imagine that triplets and 3x every cost is NOT defined as a hardship! So ask.
Just getting the teachers to communicate with each other as often as possible before they communicate with you will be helpful.
I hope all of you have a wonderful year!!