I used to drive a 2WD car in the sand until I got my KJ and I got stuck more than a few times, but never needed a tow. Some CHEAP solutions from a beach bum:
1.) Air down more than you think. We're talking down to around 1/3 to 1/2 of your normal tire pressure (12-18 PSI.) I've even gotten unstuck by letting some air out of the tires. Stay in your comfort zone though, and don't drive too far on roads before airing back up, or it'll wear your tires and you risk a rim striking the pavement and getting bent or unseating your bead (aka FLAT TIRE.)
2.) Learn to dig if you get stuck. If a wheel slips and you feel your rig sink on that side, STOP power to the wheels, get out, and dig a trench on either side of that wheel with a gradual incline so it can roll up and out of the hole you just spun with your tire. Use water to pack the sand down if you can. See #5.
3.) Keep 'er movin. Once you get unstuck, keep your vehicle moving, if at all possible. If a wheel slips a little, don't worry just keep it coming until the rig loses all its momentum. Then get off the gas quick before you spin a big hole. See #2 and #5.
EDIT: This does NOT mean drive really really really fast! Take it slow and be patient, but don't slam on the brakes when you fishtail- ease up on the gas a little & let your momentum carry you through.
4.) Find the better path. Packed sand vs. Loose stuff. Bigger grains vs. smaller. Gradual slopes vs. steep. Grass vs. No Grass (make sure it's legal though, the grass is protected in some places.)
5.) Buy some traction mats. Make sure you have two, one for each back wheel or the wheel without a mat will slip and you'll get nowhere.
6.) Keep your rig light. Contrary to some people's belief, weight does NOT help you in sand! Think about it like you're skimming over the top. You want to sink in as little as possible. Leave the cinder blocks and sandbags (and any heavy gear you don't need) at home.
You'll be surprised as to how far you can get with just a 2WD. I live in South Texas, and 80% of the people I see driving on the beach here don't have 4WD and still don't get stuck much. You won't be dune-hopping or mudding anytime soon (unless you want to get stuck!) but you'll be able to get around on the sand OK.