Well, Rose, it is a rant because you are justified in wanting to rant - the comment about sacrificing 10 days justifies that.

Let us see... 10 days is 8 business days and 2 weekend days.

In America, a typical employer provides how many vacation days?..

...not that many more than 8 business days. More, but not that many more.

So he is essentially trying to say that it is not a big deal to sacrifice an amount of time that is not much shorter than your typical American vacation. How is that not a big deal? Plus, in reality, you will need time to:

1) prepare for the visit
2) recover from the visit

If you take the days needed of (1) and (2) combined, and add them to the 10 calendar days of the actual stay, you will have exhausted your vacation.

And that is not a big deal for him?