We have a bissell carpet machine and clean our own... I don't think there's much pad below the carpet, so it dries quick, which is good, because it's probably wet directly on the particle board underlayment.
We always plan our cleaning for a time we can keep the carpets exposed, all slides open and the heat on - with extra fans, if it's humid out (which happens occasionally here in Seattle, HA!). You may not have that issue.