Not wanting to be a curmudgeon but it is in my blood so I can't help. <g>
Seriously, I would be extremely leery of
anything this appraiser tells you. Three things in particular:
- The term 'appraiser' - This may be your term and not his. But they are known as 'surveyors' not 'appraisers'.
- A lead keel - While this is possible, I have owned a fixed-keep Midship 25 (Hull # 72) for more years than I care to think about. In all of my research I have never seen reference to a lead keel. I am fairly certain that all Midship/Dawson/ParkerDawson boats (swing and fixed keel) were built with iron keels.
- The term 'full keel' - Here (due to the quotes) I am assuming that this is in the expert's words. A full keel is a keel that goes (at least most of) the length of the boat. As in schooners of yore (America, Elise, etc.). The MS/D/PD boats were all equipped with a fin keel, usually retractable.
These may sound like nit-picks but ... no self respecting sailor let alone surveyor who is qualified to survey a sailing vessel would misuse the language this way. Unless you have changed his language, he sounds to me like someone who is used to 'appraising' 20 foot Bayliners in his spare time.
As far as offshore ... Lowell is correct, any small boat offshore can be dangerous. On the other hand, these hulls are very strong. The fixed keel version is a better sailor than is the swing keel and many of the swing keel boats have been used offshore.
The weakest point I have found is the aluminum rudder cage. Life in open water is a real drag without a rudder, that (and maybe heavier rigging a la Prodigal) should have your first attention.
Someone mentioned bailing equipment ... I don't have a problem with the companionways (properly used) but the cockpit scuppers
are on the puny side. Even given this, most of my Midship sailing is in the Western Basin of Lake Erie. When the wind blows, our water stands up: very tall with an extremely short frequency. This means waves breaking over the boat and I have never had grave concerns about her sinking. And breaking waves will be the bulk of the water in the cockpit.
More important that anything that you do to the boat though ... experience ... see if you can crew on some blue water voyages in small boats. At the very least the US Power Squadron has some great 'book learning' resources.
Best of luck!
-Tom