Best place to get information is from the web site of the International Nonsuch Association. Home
The INA is very active and you'll get lots of good advice.
Nonsuches were designed as the ultimate coastal cruiser, and are not bluewater boats. Cockpit is too big, drains are too small, no bridgedeck, etc. But they are fairly fast, very maneuverable, and easy to single hand. And build quality is excellent.
The very early Nonsuches did have problems with their masts because of bolt holes that were drilled down low by the deck level. Hinterhoeller replaced them all under warranty. A new mast for a 30 is nowhere near $100K and I cannot imagine that a mast for a 36 is 10 times the price of the mast for a 36. That's just sillly. Propane lines are tee-d in the cabin, but that's a very easy fix if it hasn't been done already. Hulls are cored, but so were a lot of boats and Hinterhoeller did it really well. I've looked at a lot of boats while shopping for mine and none had wet cores in the hull.
The sail on a 30 is big--about 540 square feet. Air draft is about 50 feet. The sail area on a 36 is 740 square feet. That's huge and I'm guessing you'll want some help from electric winches.
The 33 is a very good size boat too, you might take a look at that as well.
Good luck with your search.