It might be better to have 45 minutes every 2 weeks with reports, which is 1.5 days every 2 weeks. Then probably another 2 days every two weeks for sideways and upwards meetings, 2 days for ad hoc planning and design work, and 4 days for coding and reviewing.

Hope they're well paid!

30 minutes of chat is one thing but one might expect work to come out of it such as things you have to do for or about that person.

IMO it's just efficient to use any excuse to say "what's up, how did the house move go?" or whatever and make sure that you do that with everyone and that you behave in such a way that they don't fear or hate to have a 5 minute chat and know you are ready to listen if they want to say more. i.e. to take an actual interest in each person.