Having made many a tea over the years having captained sat and Sunday sides you can make a perfectly good tea for 26 people ( 22 players, 2 umpires and scoreres) for £40.
8 fresh begets £7
80 frozen sausage rolls £5
Packs of Ham,cheese,chicken etc £7
Fruit £6
Crisps £3 multi packs
Cakes £7
Squash, milk, tea bags £5
From that lot at any supermarket its a decent lunch. Or you can make shepherds pie. Lasagne etc for that amount easy enough. Main thing is to have a kitchen to cook hot stuff and prepare in. We have one person per week who spends £40 which is what the league allow you to charge and then brings to club. We get to home games at 12pm so have plenty of time to prepare tea and warm up etc.
Like has been said cricket tea is a key part. Not just for food but some of the best banter I have been involved in and heard has been round a cricket tea table.