Experts have pointed out that the enormous cost difference between Mangalyaan and Maven is because the Indian Mars-craft is far simpler than Maven. “They’ve kept it small,” Andrew Coates, who will be a principal investigator on Europe’s Mars rover in 2018, said of the Indian Mars mission. “The payload weighs only about
15kg. Compare that with the complexity in the payload in Maven and that will explain a lot about the cost,” he
told the BBC.
Who's 2nd?
It is true that for scientific understanding, it is good to explore all planets. But like I said, there is priority set for important planet. Space, as you may well known, is extremely expensive. There is a limit budget and we got to use the money to the fullest extend. The main purpose for space exploration is potential human settlement because the earth will not last forever. Mars to this day, have been the MOST study planet in the solar system and there is a good reason for that and it is what caused Media frenzy. Matter of fact, it is so important that all space powers focus exclusively on Mars, USA, Soviet, EU, and China. We will attempt to land a rover in Mars in 2020s. We already build the rover and given the success of Moon lander, we hope to achieve EDL technological system (entry, descent, landing) breakthrough like on the Moon.
It was a short-live rover. The real success of the rover is the Spirit, land in 2003 and produced the most value Mars information.