hey your business is not that complicated to have an app for trust me you just need a nice good looking website to have appointments booked thats all now i have a running software agency we make apps animation websites you name it but it would not be in your best interest to have a app developed if you just want a good looking website thats affordable it will cost you around 2k-2.5k with 3-6 months of free service feel free if you need any other advice regarding this