The first thing that you will need to consider when planning for the cost of getting or using a new Alliance stair lift is the model. There are different models available in the market, which also means that the cost of getting them is different. You should take your time and do some research. This will make it easier to know what makes the difference between each of these stair lifts, and the one that you can afford. Since you will not be installing them on your own, you can also consult the technicians that will handle the installation to advise you accordingly.