Our son Carson is 16, we have a Class A Motorhome that we use a lot. It has become impossible for me to piggy back him up and down our stairs, My daugher and husband are managing, but with difficulty. We are looking at a Coach Lift but they are very expensive,$3800.00 plus by the time we get them sent up from Arizona and then someone in Canada to install that's another $2200.00. Does anyone know…