Extremely low maintainance lizard?

Just be aware if a light bulb blows out that could be your entire monthly supply budget in one bulb. On average the reptile lights (for basking and UV) will run you 5-50 for the bulb. For 30 you can get a few reptiles but not one that fits your requirements. I would suggest looking in to a bearded dragon or a blue tongue skink. The intital costs will be a bit more than you want to spend but in the end you will have a lizard that fits what you want. Getting an adult or older juvie lizard will also allow you to not have to worry about feeding multiple times a day. So for either lizard once you finish the setup you would only have to worry about feedings, replacing any blown bulbs and changing the substrate once in a while. Food for both would run you about 10-30 a month at the most. You will need crickets, worms and greens, fruits and veggies. If you go with the blue tongue skink you would need to feed it a pinkie or hopper mouse about twice a month. A good site for forums on different types of lizards is repticzone.com. Good luck.