Vaulted ceiling and conservatory dining rooms!

My neighbour is building an extension and it got me thinking; perhaps I should do that?  Why not? The dining room I have is too small for all our extended family.  At Christmas I bring the garden table indoors and luckily it's the same dimensions as my dining table so we put both together and manage to squeeze in 14 people!  The only problem is once you're seated you are trapped there until everyone has finished their meal.  So a dining room extension would be the ideal thing, well that's what I'm trying to persuade my husband anyway.  We could build it onto the side of the house and get into it through the existing dining room which luckily has a window at the side we could easily turn into a doorway.  Well that's the plan anyway.  If all goes well this time next year I'll have a new dining room extension measuring 3.5m x 8m so I should surely be able to accommodate everyone then.  I've chosen some of my favourite images for inspiration, see what you think.  I'm drawn towards a vaulted ceiling with velux or glass and sunfold doors opening on to the garden at the back.  I can't sleep at night for dreaming about it!