One-Page WP site for License Security products

We are a small IT company that manages some business in Spain and Brazil and want to expant on online systems. We are abble to create and manage WP sites with famous templates like X theme, Avada, X theme, enfold, Jupiter .... We already have some sites working with this kind of technology. We specially want people that know how to use Visual Composer, Ultimate Addons and have made hundreds of WP sites, so know a lot about WP, tricks, fats ways to solve issues, etc. But now we want to build a new WP site selling Anti Virus and related products licenses, initially we will sell just a couple of products: 1.- The anti virus license, where user will select the number of years and number of computers for the license. 2.- A Windows VPS with this product included, where user will select one of the three VPSs size. So will require a kind of slider as you can see here ([login to view URL]) and here ([login to view URL]). Later, we will include other anti virus Business licenses, so we will have to add more products on the main ONE-PAGE-ONLY site. We can use any of the themeforrest commercial WP templates (we have them all), but one tech suggested me to use hostchillyv3 template, coz integrates our main billing system WHMCS. Well, here's the main idea, I want your bids, and I want just very experienced people on this area. Please, bid cheap and give details. Thanks,