If you have the budget for it, it can be done. See who specializes in Nura and which lady most appeals to you. then ask her which lady she would want to join both of you.
larger budget for four ladies but again try to find one which you like the best and have her suggest the other three.
Tipping is always gladly appreciated, but never required or expected, so there’s no standard amount. If you would like to tip your girl, then give her whatever you feel like she earned.
Multiple girl parties are very common, and the only limit to how many ladies you play with is how much you are willing to spoil us. We all have our go to girls that we are comfortable playing with, so it’s best to find a courtesan that you like the most and let her find you a few friends.