Possible goal.. Will this work?

So- my big weight loss after surgery is supposed to last for 6 months or so- that's when you can lose the maximum amount of weight - you can still lose later- but its a little more difficult.  I'd like to attempt to lose all the weight in those 6 months!  I know there's no magic switch that at 6 months a bell rings and signs that times up or anything like that - but I have a plan to try to take advantage of it--

by clumping weeks into 2 at a time - I can adjust how much I can hope to lose per week to hit about 100 lbs weight loss total (my plan actually does 113) and this would assume that I lose a couple of lbs more before the big date. 

Weeks 1+2     20 lbs.      6 hrs./ week work out
Weeks 3+4     10 lbs.      6 hrs./ week work out
Weeks 5+6       8 lbs.      7 hrs./ week work out
Weeks 7+8       8 lbs.       8 hrs./ week work out
Weeks 9+10     8 lbs.       8 hrs./ week work out
Weeks 11+12   8 lbs.       8 hrs./ week work out
Weeks 13+14   7  lbs.     10 hrs./ week work out
Weeks 15+16   7 lbs.      10 hrs./ week work out
Weeks 17+18   6 lbs.       12 hrs./ week work out
Weeks 19+20   6  lbs.      12 hrs./ week work out
Weeks 21+22   5  lbs.      12 hrs./ week work out
Weeks 23+24   5  lbs.      13 hrs./ week work out
Weeks 25+26   5 lbs.       13 hrs./ week work out
Weeks 27+28   4 lbs.        13 hrs./ week work out
Weeks 29+30   4 lbs.        13 hrs./ week work out
------------------------------------------------------
= 6 months       113 lbs. lost