All transporters will use one of the same companies to transport from the west coast dock to Oahu. Call Matson, Horizon and Pasha and ask for a quote from their west coast dock to Oahu. Next call several transporters and ask for the cost from your home to Oahu.
Lets say the shippers quote $1,000 from dock to Oahu and the transporters $3,000 from your home to Oahu. You may want to consider if the extra $2,000 is worth it, or if driving a scenic cross country trip is worth saving some money.
I believe Horizon also does point to point so they pick up and deliver in-house and do not use third party contractors.