I manage 80 sites of varying sizes. Small brochure to large scale eCommerce.
I have a way of charging for support and assessing a monthly fee for this time and it's currently "adequate" but I don't know if there's an industry standard for this. How do other people assess the support needs and cost for a client.
The other part of this question is about standard support and priority support. Is it unethical or sleazy to have two support options. One with X number of hours for a response time and charge 50% more for half of X number of hours for a response time.