ya helis are rare around here, just an hand full in the area. there is prob one medical helicoper, maybe one police helicoper and 2-3 privately owned ones including the R44 i know about. there is prob about the same number in spokane nearby.
my only experience was first on a big one in hawaii then then R44 scrunched up in the back seat of that, i am spoiled as well.
an R44 runs just under 500/hr, i think 4 hrs of flight time should do it, the pilot here said he wouldnt charge for resting time on the ground. i am thinking of downloading and looking at footage as i go, no rush, but maybe rethinking it... depends on how good it goes and how i feel. i think the bigger ones even tho more expensive we could do it in less time. doesnt matter to me its all added on to the job anyways!