but multiple pops as long as its humanly possible.

if your dick can cum 2x in 30mins then first let me bow down to you cause your my idol.  second, the girls dont mind.  but dont expect them to go all out trying to make sure you cum 2x.  they will not tire themselves just for your cheapness of doing a 30min session.  they have other clients so need to pace themselves.  

your problem will be trying to get the keys to unlock the gates to kgirl nirvana.   you might be stuck with the chinese and thai girls.  they have different type of reference requirements so more likely that you will be able to see them over a kgirl.  with these race of girls i can't say whether they will do multiple.  ive seen couple of chinese and thai girls and they didnt want to give me a second pop unless i paid more.

good luck