As far as cooling/heating there are permit code considerations that go along with adding duct work or an additional system like a Mitsubishi split system for $3500.
I think if you have solar glass and ventilation you will not be in an area that is hotter than the outdoor temp, and with your living room sliders open some of the A/C will add to cooling as will heating.
Again using the correct glass will heat the slab in turn the space.
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