It's more of the value and timing issues rather than differences of $20-$30....coz let's say all your 2 or 3 of your 4 gals turn up at the same time then leave within 10mins then u r not getting your $$$ worth. In the end u could b only have 1 hour out of the 4 hours sitting with gals, whereas if u book a gal u can have her for 4 hours of her sitting with u. So in terms of per minute sitting time, it could end up better value for you