Must DTV put a dish on my new metal roof?

So my father has ordered DTV against my advice, nonetheless he's old so I'm trying to help him out cause he said he doesn't want them to punch a hole in his brand new overly expensive metal roof that was installed just last week, but I don't see any other way they can make it work, it said in the fine print that basically he's already given them permission to do so but I'm waiting outside his house for them to come today, specifically to make sure they don't ruin his new roof 

My question is thus: must thou have to put it on the roof? We live in the country on a farm and there's no poles or anything nearby, any other options? I'm sure in this day and time you can see how a $50,000 roof could mean so much, we live in Florida if that's of any consequence