AC recommendation

Tried managing without AC for 5 years but feels like this summer is going to be torture. We are 4 people and bedroom doesn't accommodate all. So looking to get it installed in hall as we will only be using it for the next 3-4 months. Please recommend AC for top floor 250 sqft hall with open area to dining. Will I have to install glass door to close the open area? Confused between 1.5ton or 2 ton. Looking at below options. Daikin 1.5 ton 5 star at 46k Carrier 2 ton 5 star at 54k Lloyd 2 ton 5 star at 53k