There is a old joke
(Q) How can you make a little money in Israel
(A) Bring alot with you
It is very expensive to live in Israel and its tough to make Parnassoh there
I dont know if the OP realizes thats you just cant move from Israel to UK or USA, to get to USA you need a VISA, if you dont have one you cannot come to USA and even if you do get one you are not allowed to work without a Green Card or some authorization and there is no social net in USA like there is in Israel