It all sounds rather expensive to me. My tour (posted above) was only $210 for 3 pax. (i.e. $70 per pax.) We had a private tour.

Points to consider:

- The bus at Aguas Clientes is $12 each way. It's very easy to buy your tickets at the booth but make sure you take crisp, new bills. They will complain / reject your money if it's folded or otherwise "used".
- I concur that 3h is insufficient time to properly explore MP.
- If you want the iconic picture of MP, take the path that turns sharply left (and goes up) as you enter. If you want an easier walk, go straight ahead.
- For the various sites in the Sacred Valley, a boleros truisticos is (I seem to recall) 110 Soles per person. It's relatively expensive but not a fortune by any means.
- Entrance to the sale mines costs an extra 10 or 20 Soles per person
- If you buy your own MP train tickets, buy them now. Don't wait! Train tix sell out quickly.
- I didn't do it myself, but my research of Huayna Picchu leads me to believe it's 2h up and 45 to 60 min down. There are only 2 timed entries to get there. The climb did not look straightforward to me.