Hi,
Operating conditions will be 5 000 feet and hot, seating up to 6 ( with reasonable baggage space ).
if you decide to buy a twin, I think the ec-135 will be to small to transport 6 people with baggage an a few liters of fuel.
But take a look at the ec-145, verry good helicopter with much room for px and baggage. Also power and speed is good.
I enjoy reading here, please let us know what your decision was, and which helicopter you choose.