Try couch surfing, I think theres a website about that.
I would buy a 70-100 amp hour deep cycle battery, a couple 20 watt solar panels, a 6 amp charge controller and a 250-400 watt inverter with alligator clamps and cigarette lighter plug so you can keep your laptop and other small electronics charged. While driving charge your laptop in the inverter with the cig. plug using your cars alternator and when stopped use the solar panels to charge your deep cycle battery and clamp the inverter to the battery with the alligator clamps. Also get a cheap digital volt meter to monitor your battery voltage, if it gets below 11.5 bolts stop using it until you can recharge it.