Daily order limits MFN/FBM

Hi all, It might sound dumb to ask but is there a way to set a cap on the number of orders we can receive and fulfil everyday?

I ask this as I am a oneman band and at the moment I have days I get 70-80 orders to pick and pack in a 5 hours period (before 3:30pm RM collection). I fear with adding more asins I'll have days I wouldn't have enough time to do all orders and that will mess up our metrics.

I noticed this open is available for SFP so not sure why it wouldn't be available somewhere for FBM standard/ premium deliveries.

TIA.