One that small is going to be a crash pad for 4 people. All the RV manufacturers overrate the number of people who can sleep in their product.
RVs are mostly 'thin skinned' so if it is cold outside chances are so will the inside of the RV. A small electric heater helps if you have access to shore power.
You are going to need to install a heater on the water tanks and maybe a skirt. The tanks on most RVs are not insulated and in cold weather are prone to freeze. Bad as that may be for the fresh water to freeze, gray and blackwater tanks could freeze as well.
You might spend a few hundred dollars adding this equipment, but I doubt that will help if the temps start hitting the low single digits.
The unit also does not have a gas oven. So unless you are somewhere with electic power you are not going to be able to use the microwave.
The good news is that 1KW genset will probably run almost everything in the trailer.
My advice is to check with your snowboarding friends that have TT and see what they have or are doing.
