A really full defrost can help. We do it once a year in the summer. Our fridge is over 5 years old, the only thing I have in it is a light bulb inside If you don't take electronics into account, all fridges are the same, expensive or cheap.
Are you sure it's the motor that's the problem? You can give it to the masters if you have difficulty finding the cause of the breakdown, I do not think you will pay much for the repair, unless it is impossible and you really have to buy a new one. Many things can always be repaired, not thrown away.