Um, you asked, so I'll lay out some of the numbers for you. But in addition to that, it would help if you give us some of your sailing background & skills, sailing goals, & what you intend to do with the boat. Also, an abridged resume in terms of your tool using skill level, & experience background would help too.
Basic
sails alone, for a boat like that, will easily run you $20k (if not twice that, if you want any performance sails/ones to cover the full
wind spectrum). And if the sails are shot, plus, given the age of the boat, then it's time to re-rig; Standing, & Running - so $10k+. Then there's a minimum of $10k per
engine & drive unit, if not $15k per. And likely some major
wiring work/systems which need updating. Paint's another eash $10k - $15+ ...
Now this isn't counting anything like repainting the
interior. Upgrading/replacing any of the systems in the
galley.
Wiring in a full
charging system for all of your toys... nor
buying said toys;
Navigational
equipment.
Self steering. Ground Tackle. A
dinghy, with
outboard, plus
davits.
Water maker, with large tank capacity. Dual
fuel filtering systems,
tanks, &
engine instruments + controls.
Each of the above is going to run anywhere from $5k - $15k. And that's with you doing a fair bit of the
work.
Nigel Calder is pretty much the guru, when it comes to sailboat
maintenance, upkeep, & systems
installation & design. At least in the eye of the general public. And I HIGHLY suggest
buying some of his
books, in order to start getting a handle on the systems onboar
boats.
Anyway, he also wrote this excellent article on refitting
boats, & it's worth a read.
A Refit Reality Check | Cruising World
So, I'd suggest that you start looking into the costs of the things which I mentioned, for yourself. That, as well as what you & the Mrs. want onboard a boat, & generate a checklist, plus a spread sheet. It'll help to give you a no nonsense idea of what any boat's really worth, in addition to what it'll cost to get her
cruise ready, and or up to your personal specs.
Along with that, it might behove you to hire a
project manager cum
skipper, to help you to navigate through all of this. And to keep tabs on how things are going with any
refit.
Hell be able to save you a fair bit of coin, & keep your stress level a good bit lower during the process. As there will be a dozen or two contractors, & specialists involved in putting your boat together.
On surveyors, look up the SAMS & NAMS websites. They are, respectively, the Society of Accredited
Marine Surveyors, & National Association of
Marine Surveyors. And they'll help get you started on surveyors in your area, or in that of a perspective boat. Plus, when you get your short list of names, it's a good idea to do some asking around, including on here, to get a feel for how good they truly are, as well as how easy they are to
work with. Including their ability to turn technical speak into layman's terms.
Also, there are some great surveyors here on the forum. So, done properly, you can pick their brain's a bit on things. Including how to choose the best
surveyor for you.
It's a lot of info I know, but hopefully helpful.