How to make web-portal ( http://ift.tt/1MAAmJZ )?

i have an idea for a web-portal, aiming for a place where people can find jobs international, (for example they can get a job in other countries before move-ing there etc)

i wonder if there will be possible to earn money on this idea? and how should i go further to make project real, if it turns out to be a good idea?, and how to get users?.

i need real programing expertise ti find out if this project earn the right to live, and if it will gain users?

i might be a mobile app aslo.

-k