Build & Design a Website, and Mobile Applications

1) Interactive Website Design & Develop A forum system, calendar for events and other e-commerce plugins for a Sport website 2) iOS & Android Mobile Application For the forum, calendar events and other ecommerce plugins. I want offers for both native mobile applications or cross platforms. Please send me detailed offers with expected timeframe and cost for every step separately. The forum, features and plugins will be discussed later on. I need your recommendation on the forum system, platform/CMS to be used for a user friendly, fast, reliable and no future maintenance for non technical people to use.