If you are seriously interested in this kind of Overland travel, checkout http://wikioverland.org The Encyclopedia of Overland Travel which contains pretty much everything you need to know.
I documented the whole process in great detail so others can do the same: http://theroadchoseme.com/shipping-across-the-darien-gap-pt-...
I've just finished paying off my Credit Card, so have started saving for the next one. I work full time and am just about to start my 2nd and 3rd concurrent jobs.
The whole price breakdown can be seen at http://theroadchoseme.com/the-price-of-adventure
You just get a trip there and that's what you do. Or you can hike.
There's also an out-of-service submarine base in montenegro, and you would not need land rover either since it's on island.
Balaklava is a nice place btw, didn't visit the museum but liked the town.