Costs for laser treatments are going to vary extremely widely, and will depend on the type of laser being used, the person doing the treatment (facial plastic surgeon vs laser technician for example), the local market, and how aggressive the treatment is. Some treatments require anesthesia to make the procedure comfortable, while others can be performed under just topical anesthesia (numbing cream).With respect to utilizing a series of treatments versus one treatment, this really comes down to the recommendations of the treating physician, the type of laser, the goals of treatment, and the available budget and down time. I have some patients that would prefer to go less aggressive with shorter recovery and perform several treatments over a series of months, and some patients that only have 1-2 weeks to recover and would like to go as aggressive as possible in one treatment.Be sure to find a doctor that specializes in facial aesthetic procedures and can review all of the options with you in detail.All the best,