having a domain and Wordpress site would be good if you can make it big that you can produce podcasts and several articles a day like the coindesk or cointelegraph.
Erm, no, it takes about a year from website creation, and big pockets (we are talking 4-digit sums), to get decent results on Google and enough to hire enough talent to produce 1-2 posts a day. And this isn't even anywhere near bitcoin.com news or coindesk which produce as much as 12 posts a day. Just buying the analytics and SEO research services will set you back $1500/year somewhat as monthly rates are even more expensive in the long run.
Several months after you start out your traffic's going to be dead due to lack of Google traffic, so your target shouldn't be to "compete big", but to generate enough posts whose title searches place them on spots 1-3 on Google.
Speaking as someone who owns a news outlet here.
Anyway, that's a really impressive selection of guests you have there, OP. How did you manage to get a hold of all of them?