How many screens is too many screens?

Need to replace current WFH set up. Any tips / recommendations on what monitor(s) to get without totally breaking the bank. Needs to be compatible with mac laptop. Thanks in advance chaps. 

I'm going to be doing this soon and I think I will get two 27" screens that have a USB-C hub and a Displayport output so you can 'daisy chain' them together.  Meaning you just need one cable to hook up your laptop to both (and your keyboard, mouse etc).  Samsung seem to do one called the  S27A600UUU.  I don't think it's a brilliant display but for work it will do the job.

If you do real work you will know why two smaller screens is much better than one big one.

You could do what I do

Get a serious eye condition and get your company to pay for reasonable adjustment under equality act 2010, then you can have as many monitors and hubs as you like. (I only have one because I visually can't track the mouse pointer)