Climbing Rinjani using trek organizer service (TO) or Rinjani Trekking company or travel agent is the best choice for you who do not want to bother and want to enjoy the beauty of Rinjani mountain with more easily, comfortable and safe, but not expensive cost.
A travel agent or track organizer who sells hiking packages to Mount Rinjani is easy to find on the internet because all travel agents have websites to sell packages online, but to get that sell packages with cheap prices and good service is certainly not easy.
Below are some local travel agents Senaru, Sembalun, and Tetebatu that I know well and sell Rinjani trekking packages at affordable prices and good service by preparing such as shuttle transport, accommodation before climbing, food, and drinks during the ascent, guide, porter, and camping equipment and you can contact either via phone or email.