Welcome to HK and hope you enjoy your stay.
But you posted this thread in a wrong forum, this one is for making reports of girls you have visited. The
Q & A forum would have been more appropriate.
As for your questions. Hotels here do not mind you ordering in girls. All HK hotel girls fit your budget, except Japanese. So it's up to your preference; read reports to find out good providers.
And for more info, these are threads you should read: