Advice on where in USA to go with kids

Hi I am a Single mum of small children and the ten year old said his dream would be to go to the USA I want to try and make this happen. Can anyone help me work it all out as it doesn’t seem as simple as booking to go to Cyprus etc . Disney I know is there but I would assume there are long waits for rides and is expensive to get in? So that isn’t a must as I will be on limited money so can go depending how much it would cost .... so there is just myself and my 10 and 7 year old.. I don’t know how much food and drink is there so I have zero idea what I would need spending as I usually book all inclusive... any ideas where we can go . Obviously Florida seems the obvious one. Is that the best thing for me to just go there? How much are the parks? Any help would be greatly received