I want smaller implants! I think I went too big. How much would it cost to have them removed?

Hi! I was wondering is it a good idea for me to take out my implants,when I decided to have kids,than replace after, I'm done with birth,because My boobs are too big rn,and I do not wanna go bigger and want to avoid lift after,I actually wanna replace it smaller,but for someone like me,I don't have the money to just go switch my implants,cause it's too big so I have to wait. How much would a Implants removal Cost? Would it go back to normal and can I breastfeed after. Thanks.