Can you estimate the price of constructing a high-end technological device? Your estimation of the number of hours necessary to make it operational is appreciated. There is a good chance that you are incorrect on both of these matters.
It is one of its most remarkable aspects that this entire system can be implemented at a low cost. The Arduino board may be purchased for less than $20 (and in some circumstances, for less than 10 bucks), and most of its peripherals can be purchased for a few dollars each. In general, the cost of building anything yourself is far lower than the cost of purchasing it in a store. The satisfaction that comes from developing and constructing something by oneself gives you an indescribable sense of pride, which only serves to increase the item's value.