How much a hydroponic system cost varies and will solely depend according to your preference. A hydroponic system can be cost-effective or require more if you put some things into consideration. However, you should know it will require an initial investment to get it up and running.
For instance, already made hydroponics may still require you to purchase a pH meter, grow medium, grow light, or even nutrient solutions. Just a grow light might cost $15 to $20.