Bridal Party Kids HELP

Ok here is the situation We wanted to have my oldest niece and cousins son as ring bearer/flower girl-- then we added oldest of each family so we came to 2 girls and 1 boy then the two next youngest would know that their older brother/sister were in aunt laura's wedding and they were not(they will be 6) so we were up to 3 girls and 2 boys then Jeremy got involved and wanted to include his cousins 2 girls so now we are at 5 girls and 2 boys--I love kids so I am ok with all of this (I know I am crazy- but these kids are my life) the problem-- I have 2 more nieces who we decided were too young to be included and were not inviting( my godaughter who will be 2 1/2 and niece who will be 4 1/2) But my SIL's want the 2 youngest invited--- I need so help-- either way they will do as I ask--part of the issue is we didnt want anyone under 5 years old--and the other isssue is the cost for children is astronomical--- Any help/suggestions would be great Laura

Thanks!

Jamelle