I can drill holes cheaply.
As to the compartment, there are two rather empty compartments at the 'foot' of the rear bearth, I assume the A/C unit will mount in one of them, but I haven't seen the dimensions yet.
As to the sea water pickup, I thought I may be able to Tee off of my head raw water pickup at the seacock under the step to the salon, or is that not acceptable? I believe the 110v pump is included, the deal says these parts are included: "a two-piece unit (permits use on smaller boats), with all controls, evaporator, condenser, water pump, water inlet canister-filter assembly, mounting bracket, plumbing pieces and flexible ducting."
Thanks for sharing your thoughts on this, sometimes these 'deals' are not such a great buy!