Moving companies will send there folks out and give you a quick (and free) quote. Call on Monday and they'll like be there within 48 hours. You'll have realistic quotes within a few days.
Most of the major movers in the US, like Allied or United Van Lines, will partner up with firms on this side like Tiger or Santa Fe to provide door to door service. You can initiate the move from your end by calling a couple of big movers in your area or you can contact Santa Fe or Tiger here in Hong Kong (who will then call the movers in your area).
I should note that many of the movers dislike or actually disapprove you "packing your own stuff" do to the insurance liability that goes with it being "non-professionally packed".
I did a 20 footer door-to-door with packing from the East Coast near Baltimore. Took about 9 weeks and I think it was $6,000-$8,000 USD. Can't remember honestly as I didn't see the bill.