I want to save up by eliminating unnecessary expenses such as beauty products and spa fees
I want to save up by eliminating unnecessary expenses such as beauty products and spa fees=美容用具やエステなど必要のない出費を削って貯金をしたい
save up=貯金
save moneyやsave up moneyとも言います。
eliminate=省く、削る
unnecessary=必要ない
expense=出費
beauty products=美容用具
spa fee=エステ費用
Good luck saving up!!