Many independent travellers miss out on a good time visiting sites because they insist on doing it alone (this tends to be truer on Luxor’s West Bank). Whilst they think they are saving on their budget, they can often be adding to it due to having to rely on taxis, when a minibus with a temporary group (including a guide) is much more feasible and usually cheaper. Being part of a temporary group is also a superb way of avoiding hassle as the guide will often chase away any offending vendors.
If your hotel does offer you the chance of a tour in a group, please consider it before heading out alone in a taxi. The total cost may be more beneficial to your budget, especially as you will have transportation, usually a guide, sometimes the admission prices (saves from long queues for tickets), and a recognised route.