A Best news website or a news portal is noting but which serves the news online and upto my knowledge there are three types.
Who are dealing with paper news, tv news, and online news (YouTube or news portal) or any other source.
A well famous news portal which are only famous in online like yahoo, huffpost, yourstory etc.
Which are small ones, it might me regional news with respective language and little bit national coverage news with appear on these portal or related it's niche like pinkvilla which based completely on entertainment or xda developers which is complete tech review and many other.
Most of them fall under third type becoz it's easy to work on them and there are many people still joining the third category.
So what all it takes to start a news portal?
Domain & hosting.
A good theme and little knowledge to arrange things.
If you choose to write it's enough or if you want some other to write you have to think about investment in this.
Content writing skills and editing skills along a niche.
Finally social media to promote your news.
What would be investment?
If you want to check weather it would work out or not for you with your own writings then it nearly takes 10k or it might grow little big and that will be up to niche or categorie of news they want to cover.
What would be returns?
If you write well and do a good promotion it will be just few months up to three months to get what you invested or else you have a whole lot time to experiment one year and you can know what could work for you.
If you put a simple math in here
10k /12 months = 833.33 per month
Now let's think that you were able to get thing done in three months of your basics and if it takes three more months to earn what you invested you still have six months left in your pocket.