Macha, most of your postings are asking for start-up design ideas. Wouldn't it be better if you said, "this is what I have now, how can I improve on this?"
That would certainly encourage me to look at some designs and offer suggestions, but if it comes to figuring a design for you from scratch then I am going to want $250/hour and a minimum of 10-hours just to get started. We are here to help, not do you stuff for you, so count me out on this one.