36349 Support person to run helpdesk

Hi I need support person to answer question on my helpdesk. This is NOT for hosting. I have several websites and problems are usually give them password, tell them how to setup or configure something or check if they pay and send them download link. I would like to have ticket answered in 12 hours, in same cases it may be in 18 hours but most of tickets should be answered in 12 hours. Currently I have about 20-30 tickets daily sometimes less someting more. At the beggining if you do not know answer you will ask me and then I will tell you want to answer to customer. As time pass you should remember what I already answered to you to be able to answer customers without asking me. I want to pay flat fee per month. This is long term. If you are responsible and answer on time you can do it for years. Please bid how much do you want per month to answer helpdesk question.