MODx, Wordpress or Drupal for a multifunctional information portal?

Question

Drupal

Please help me decide on a CMS for a web portal with growth prospects.
Format
Multifunctional information / training portal (video, articles, news, events), a map of establishments on a certain subject, the ability to buy tickets for webinars and view online courses + a small / simple freelance exchange of masters. 
Similar sites:

• www.kudago.com/msk
  
• neva-room.ru
  

The budget is not very large, we are not considering a self-written engine yet, because. there is no specialist whom we can fully trust in the long term.
Basic requirements (in order of importance):

1. Site speed.
   
2. The convenience of the admin panel for the average user.
   
3. Prospect of development and scalability of the project.
   
4. SEO.
   
5. Security.
   

Thanks in advance for your replies.

Answer 1

It may not be enough to do everything right away, neither the budget nor the time. Especially if the budget is limited.
Therefore, it is worth highlighting the main functionality with which it will be possible to launch the project. And make it the first step.
The rest, add after the launch.
When choosing an engine, there is no particularly fundamental difference on what to do. Collecting the functionality you need out of the box / plugins on any engine will not work. In any case, you will need to add code.
Therefore, focus more on those programmers who are available. On the budgets they request, the deadline, on their qualifications, and not on the engine that they offer.

Answer 2

On MODX, all this is long and expensive to cycle.
When the budget is tight, WP is usually chosen to do it all with plugins.
But it is optimal, of course, to write on one of the popular frameworks.

Answer 3

You need a lot of money, a lot of money for this. If you use third-party ticketing services and online there are all sorts of courses - (there is usually a subscription and rather big one), then any