Joomla Template Modification

I have an advertising company and need potential clients to visit my site, choose their option, and then check out on the site using google and/or paypal checkout. I also need a live calendar so potential clients can see if the dates they are purchasing my services for are available or not. (JXTC booking calender / Template / already installed ). You will need some photoshop knowledge to upload different snapshots of my websites for customers to choose advertising space on (those are the products). My Budget is 100$ . Kindest Regards