How much should I expect to pay for hair loss treatment when I first start?

Recently, I feel like I am losing more hair than before when washing or drying it, so I am looking into hair loss treatment. In particular, the crown of my head looks a bit sparse in photos, so I wanted to have my condition checked at a dermatology clinic before it is too late.

I am curious if the treatment method is determined after checking the current condition of the scalp and hair when starting hair loss treatment for the first time. I would also like to know if there is a significant difference in cost depending on the method, such as medication prescriptions, scalp care, or injections. In addition to the cost of a single visit, I would also like to know how long I should expect to manage the condition consistently.

I have also heard that hair loss treatment requires a long period to see results, and since the overall cost burden seems likely to increase as the treatment duration lengthens, I would like to make a plan in advance. I am also wondering if I can be informed about the treatment methods necessary for my condition, the estimated duration, and the cost during the initial consultation.