Phototherapy is a good treatment option for vitiligo. It is important for you to see your dermatologist before purchasing a machine for a proper assessment.
When undergoing phototherapy, there is a treatment regime in the delivery of phototherapy to optimise the effectiveness of the treatment and minimize the side effects such as burns. Your doctor will be able to advice you on this.
There are also localized hand held phototherapy devices for small areas of vitiligo and larger half or full body machines for large areas of vitiligo. The cost depends on the type of machines. Your dermatologist will be able to advise you further on your suitability for the home treatment.