I'm professional magento developer and designer. Please check my portfolio of my magento store development https://www.freelancer.com/u/Softinfoline.html .
** My task include:--
--> I'll install magento 2 and I can install Porto theme or Fastest theme if you want. As these theme is compactiable with latest magento version. Theme will be already configured (default function). I'll install payment gateway if gateway module is available. If you need to use Paypal, then its come with magento core.
--> My task not include design task like designing and changing banner/images, adding category, pages, products. All these come under design task and I'll charge extra for this as this will consume time.
** I need some info about your server like php version, mysql version, RAM. Shared or vps hosting. If shared server, hosting provider name. Some hosting provider not support magento 2 and they will suggest to take vps.