Sure - you still have to set a nightly rate (which I would choose based on an average number of visits per day, so if your rate is $15/visit, and you normally do 3 visits per day for an average customer, your 'nightly' rate would be $45 for a 24 hour period, which is essentially what that nightly rate is anyway), but you can list in your profile and tagline what services you offer and what you charge per visit. You may have to deal with a few more requests for services you don't offer than the rest of us do, but you shouldn't have trouble getting the site to work for you.