Steam – EVE Online starter pack on Steam: can I start later

The game itself does not cost any money, you can download the client from the Eve Online homepage freely.

The price in Steam is exactly the same as the price you pay for the initial account setup and the first month of play when ordering directly from CCP (at least in my location). You don't get any benefit when buying from Steam.

A trial account is an existing account, and usually only one type of starting bonus can be attached to same account. Though I don't know it for sure, but I would not risk it and just get someone to send me an invite to get the 21 free days and then buy a subscription directly from CCP.

As far as I know the Steam client does not have this feature. However it is a popular request in the forums, and it does appear that they are working on implementing this in a future Steam client update.

Excerpt from last link:

In addition, the new content system will allow us to build several new features that we’ve often heard requested. Upcoming client releases will include things like download scheduling, bandwidth throttling, and prioritizing which games get downloaded first. You’ll also be able to download an update to a game while you’re playing that game; Steam will apply the update after you exit the game.