[FBD]

>"I had no idea the fence was that much"<

-Yes, that is an estimate based on what Israel spent on it's fence. Israel's fence costs between 2 to 4 million per mile, but it's a pretty elaborate system.
Our border has some pretty tough terrain, however, and access would require some utility/ maintenance road building.
8 billion is a realistic number.

I believe a border fence/wall with Mexico is going to happen, eventually. Of course there will be proper exit entry stations at all the roadways.

>"does your 10 billion dollar figure include every cost to the country; medical, SS, welfare, crime you name it.Ten billion is a lot but it seems to me I have seen higher figures, but can't substantiate right now."<

I've seen estimates that are considered accurate, that illegals cost as much as 26 billion, yet contribute 16 about billion in taxes. (That includes FICA)

That is where the 10 billion dollar figure comes from; the deficit between what they contribute, and what they use in govt services, including the costs you mentioned.
Those numbers are from FAIR.

But as you said, that is hard to estimate, and some of the costs are intangible, like job displacement, victims of illegal alien crime, etc.

[NewRomeTacitus]

Every day we don't have a secure barrier adds to the overall deficit. Now that we (the U.S.) have the Islamist fanatics in desperate straights overseas I cringe at the cost of an American city or two for the sake of super-cheap labor. The average citizen isn't going to stand for mealy-mouthed excuses and convoluted explanations - they're going to want the heads of those in charge regardless of party affiliation.

Both parties will have ample representation.

At this point I believe the first thing we should be asking our reps is when the wall will be finished.