Knight6jb, I'd say frontloading is definitly better although I think your calcs are wrong if you frontload 2 e/wk for 2 weeks, you'll only have enough fpor another 6 weeks (8 week total). Saying this though, it's still probably better than doing 1 per week for 10.
There was a thread a while ago entitled something like "alternative way to do sust", which gave a good case for frontloading but also went into stuff about shooting everyday or every other day. Every week should be OK, although if you can get more it'd prob be benefical to shoot every 6 or 5 days.
Do a search for the thread it was quite interesting.
Good luck