Well first off, the total run is to long..level gonna drop like a rock and will surely be problems. Anything over 150' run from dish to Rx is pushing it, so keep in mind that there WILL be issues later. My take, dont walk away...RUN. Don't be an idiot and pay to work. (that is why I dont do DTV or Dish unless it is commercial and anything beyond a standard install is in my pocket at my rates.)
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