Building this from scratch would cost 5,000 Taka. If you calculate, the IPS alone costs 2,500 Taka, and with the battery, it costs between 3,500 to 4,000 Taka. Buying the fan costs 1,500 Taka. Everything is working fine; feel free to check it as much as you want, though the battery has become a bit weak and you can exchange it.