I am thinking of buying a CO2 laser for engraving and I am trying to learn all I can before I purchase it. Does anyone have information that they could share with me?

my dermatologist said I can get either the laser surgery or CO2 laser surgery, but she couldn't tell me how much they cost or which one is more expensive. my insurance is really bad, so I want to choose whichever one is cheaper. does anyone know? thanks. (p.s. this is for treatment of genital warts on the anus)

If so can you tell me if the results were worth it?