Thanks people, some excellent advice I think!
I suppose I should tell you a bit about myself and experience in yachting - which is limited.
As a youngster I sailed Mirrors, Flying Ants and 470's for a while. When I was serving in the Royal Australian Navy, I was lucky enough to sail on Gordon Ingates' "Gretel 2" for a day on Sydney Harbour against Ragamuffin and Siska. They passed us like we were standing still!! What a great experience that was and I feel very lucky to have had the opportunity.
On two separate occasions in the last 2 years, I've spent a total of 3 weeks on-board (and skippering) a Catalina 350 around the Whitsundays bareboating. After a day exploring around the islands, mooring / anchoring at the end of the day with a nice coldie in my mit, I thought to myself, why haven't I pursued my interest in yachting?
Which brings me to where I am now. I'm in my early 50's, been a shift worker for most of my working life, the house is up for sale, and best of all, my wife is almost as keen as me to head off in this new adventure / lifestyle! I know of people who have worked their butt off, postponing what they feel passionate about until they feel they have enough money to live to 120, only to finally quit work at 65 and pop their clogs 2 years later - no thanks. My Dad died before he got to do that deep sea fishing trip off Exmouth he so dreamed about, painful life lesson learnt there by me.
Morningbird, I've only really just started looking at yachts, are they cheap at the moment? I guess people want to get most of their money back and hold on waiting for a price they won't get? I understand that when the time come to sell, no-one recovers the cost of having owned a yacht.
Ramona, what did you mean by saying that I should buy a throw away boat for that sort of trip? Are you suggesting buy a cheap boat, do the trip and sell it after without spending any money on it? That Peter Cole salvaged boat looks like it has already been thrown away!!!

Also you mentioned that, "most people on this forum would have trouble spending that sort of money". Do you mean that most people wouldn't blow that sort of money on a yacht? The $200k was the absolute top dollar I would pay. Sorry, I'm just trying to understand what it's all about!
Southace, thanks for the link, I have been keeping an eye on the Adams for a while now. My wife and I are fairly tall and as I mentioned in the first post, we prefer an aft cabin (such as this Adams has in the link) to a v-berth. A couple of things I would like to do to it if I bought it (here comes the money!!). Is it possible to fit larger water tanks or a water maker to boats like this? If so, who do you employ to do it - I'm assuming it would be a challenging task. I would like a self furling headsail also. What might it cost to do these things?
Perhaps some of you can suggest a book that that might help me out with some of these silly questions!! I have The Sailing Bible, but it's not really geared towards buying a yacht and pitfalls to look out for.
I'm guessing steel boats are stronger than GRP but heavier and therefore slower?? But handle better in rough seas?? Are steel boats higher maintenance, I'm referring to hull maintenance I guess.
Cheers!!