Is it reasonable for the hotel to install the generator next to the room?

Unreasonable. The generators in hotels are generally 800kW generators. Although there will be silencers, main exhaust pipes and oil tanks, the noise will be very high, so it is not suitable to be installed next to hotel rooms, which will affect guests' rest. The generator should be placed away from rooms and restaurants, so that the noise will not be too great for the guests.