Originally Posted by Last Tango
Think you might be being a bit pessimistic.
That's a pretty high budget for that age/size.
Camping on the beach......5.5 meter is way to big to "haul up a beach" and probably to small to carry a tender of any kind so, you can certainly land on the beach but if you're going to "overnight" you'll have to think about what you're going to do with the boat.
What are you proposing to tow with.......that can be a defining issue ?
I carry an Avon 8 tender on my Ribcraft 4.8. Weighs about 20kg, but easily packs into carry bag which sits at the back, behind the seats. Takes roughly 10 minutes to inflate. Collapsible oars, or if you want to be more adventurous, borrow the auxilliary engine from the main boat (if you carry the Avon bracket). Stonehaven Slideshow by spartacus_025 | Photobucket
Having a tender opens up a world of possibilities, including overnight camping. Regards anchoring, I'd go with Poly's suggestion about a main line to shore, in addition to an anchor.
The Ribcraft for sale looks tidy. Like the colour, Yamaha 60hp engine is perfect power/weight ratio (second only to new F70, but still very expensive), integral fuel tank, double A-frame. Nice set-up.