Welcome! I don't know much about the Royal, but I was worried like you were. Turns out I budgeted for the high end and it was $5,000 less than that in the end! That made me REALLY happy!
So basically, I would say set a budget and then figure out the cost of staying there on the high end. If it's still within your budget... then you've found your resort. If it's not, then there are plenty of resorts in the Playa area.
Good luck!