I need a mixer reccomendation

Hello my experienced bakers and keen amateurs,

I need some advice about which size mixer to obtain for a new venture. Unfortunately diving arms mixers are out of our price range but a good old spiral is not.

We are aiming to produce about 20-40 loafs of bread a day. The loafs will be predominately 700g.

I want a mixer than could produce up to 40 loafs in one go but can still process 10.

Sorry if this seems like a silly question! We have a lot of learning to do.

Thanks

Krakow