Dish or Direct? Basically a personal choice with really not much difference. Many of us have had Dish for years and very happy with it. Others feel the same about Directv.
Being in one place long term, a tripod mounted antenna will work fine. And probably give more reliable reception in inclimate weather in the long run due to the larger dish size. Takes a little practice aiming it. Moving regularly makes an auto antenna a little more desirable. A portable antenna of either type, rather than a roof mounted one, allows you more flexibility for locating the antenna if there are a lot of trees around your site.