What country are you from? Maybe a 240V charger could be a cheaper option.
https://www.egopowerplusuk.com/56v-lithium-ion-30-minute-charger.html?_ga=2.176371809.539956317.1635...
https://www.egopowerplusuk.com/56v-lithium-ion-30-minute-charger.html?_ga=2.176371809.539956317.1635...