To upload your site after designing it is very important to purchase a reliable hosting package. Selecting hosting packages completely depends on the type of your site. You should have a hosting package at least few MB more then your total size of the website. If it is portal website or job site or any thing like this you must have higher bandwidth and above 99% uptime because it is not you may loose many important visitor or visitors may not find interest in your site to visit.

I don't think for a relatively new website you need higher bandwidth.