You see, having a big party is not just stressful, but these additional children will also be hungry and thirsty, so you would have to buy additional cakes and juice. In your current financial situation, I would not invite any of his friends, but keep the party private. The situation would be further aggravated by not having enough money to buy a present that would not embarrass your kid in front of his friends (especially so close to *********, which also requires presents), and would likely lead to additional “haha your family is poor” bullying at school. So my advice is, keep it in the family, no friends, no decoration, low key. Just make sure to explain to him why.