If you want to get really truly entry level, this is what I recommend:
http://www.hobiecat.com/mirage/mirage-tandem-island/
$5500 gets you a near perfect day sailor that needs no motor, has an excellent roller furling carbon fiber unstayed mast, does 8 knots in a puff and 11 knots in real wind. Fully rigged its 200#. Launches easily from any beach. Retractable centerboard and rudder. Simple to put in on the $1500 trailer which can literally be towed by anything. Can also be cartopped if you want to ruin your truck with saltwater.
The MirageDrive is a revelation. An easy walking pace by one person makes 4 knots, vigorous work by two people makes six. It's so much easier than paddling that its hard to describe, and I see no reason for a motor on these boats.
They make an inflatable 12' model with the same MirageDrive that would make a reasonable tender for two adults and a kid. It's so stable my brother-in-law sails his inflatable in choppy San Diego bay without amas.
It's all the fun of true day sailing at a fraction of the price.
A lot of people on the Hobie forums talk about using tents and tarps and all sorts of craziness to try to turn them into campers, and to those people I say "MacGregor."
Matt