We used Hot Spot monitors and found them to work extremely well in these types of situations. We used the ones with a volume control as it gave each musician control over their monitors and also virtually eliminated feedback. They have a very small footprint, can be placed on a mic stand (that’s how we used them – we raised them to ear level) and only cost around $130 USD.

I hope this helps.

I arrived early to a restaurant.
The manager asks, "do you mind waiting a bit?"
I said no.
"Good", he said. "Take these drinks to table 3"

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware