Feasible method for purifying the water with TDS level of 2600 ppm.

Dear friends I have a querry about purifying our area water with TDS level 2600 ppm, it is said that domestic purifying systems are not suitable for purifying water for this TDS level. Can some one suggest us a proper purifying method for this tds level and that should be an economical option. (chepset among all methods available) We can also go for desalination plant if it is feasiible to establish it on a small scale. (We want water for 2000 people daily.) I appriciate your work and I also tried getting answer from the existing questions on this portal. But we are really looking for some cheap and simple options. Your sugetions are very much appriciated. Thank you.