Basic Wap portal needed

i would need a very basic portal to offer pictures here it is only possible to charge by MT this wap portal will only show pictures, when somebody would like to buy some picture the user will click on it and a confirmation to buy the content will be asked once the user agrees, with the parameter x-up-calling-line-id the handset number and model will allow to generate and MT wap push in order to charge and deliver the content i have sms studio as sms gateway, very simple program budget is US$400