Half board and Breakfast/magic hour planning

Hey all! We are staying onsite for 2 nights and plan to do at least 2 dinners and just realized half board is probably economical as it would mean just 10 euros more for breakfast in the morning (as set dinner menu is 55 and half board is 65 a day). Just wanted to check with you all if my logic is correct.

Alsooo was thinking to get a quick coffee in the morning and maybe a pastry and walking to the park for Magic hour. Would they let us go in at 730 for a coffee and pastry/fruit and come back at 10:30 for a full brekkies? Will there will be food options at 10:30 or do they stop refreshing plates after a certain time. Lastly, do they kick you out at 11 or can we leisurely finish our meal?

Tia!