comments:
You mentioned that you didn't want to cost your parents money, but what if you got a device like this, which can measure the exact amount of energy usage, and offer to pay them for it https://www.walmart.com/ip/1027129575?sid=dd3c2687-cf5b-4dbc-be63-ab9b8bff446e A 5000 btu window unit can be purchased new for less than $200 (and used off Facebook marketplace for less). Those are ~500 watt appliances so even if it ran continuously all night for 8 hours (this is an over estimate) and your electricity costs $0.16/kwh, that would be about $25 a month. You can measure exactly how much and the cost using the meter I linked above. Since you mentioned you were willing to buy products to help, perhaps the $25/mo is doable for you at least for the summer months?