best and cheapest way to deposit money to buy bitcoin?

i’m buying around $2700 of bitcoin and have cash. cash app won’t allow me to buy much and i cant put it on my credit card so could i use a bitcoin atm to deposit the cash and send it to an address where i can purchase bitcoin? i’m concerned 2700 will be too much. new investor, thanks

edit: do i need coinhub app to deposit to coinhub atm? will they allow me to send bitcoin after it’s been bought?