Sorry but that is a "how long is a piece of string" question.

For anyone to give you any advice they need to know:

What sort of bag you want to fill, paper, plastic, woven, valve mouth, open mouth, etc.

What filling rate you require,

Are you looking for a labour intensive manually hang the bag, fill it, remove it and stack it or a fully automatic system with automatic bag placing and removal, bag conveyors to automatic palletising, etc. etc. ■