I think it's doable but will be tough, as mentioned above. That would definitely be awesome if you can make this happen. I hope you will keep us informed and I'm definitely rooting for you.

For me personally, I don't think I could do it just because of the major time commitment. Right now I commute to college ~40 miles R/T four days a week. I ride a ~42 lb recumbent trike plus ~25 lbs of things in my panniers and I weigh 158 lbs. The trip in (19.6 miles: +460 / -916 ft elevation) usually takes 1:15-1:25 total time depending how many stop lights I hit (15-16mph moving average). I try to give myself ~2 hours in case I get a flat, break a chain, detour, etc. Unfortunately many times I don't give myself that much time to get there and just pray that nothing goes wrong so that I will make it on time. The ride home (20.4 miles: +1001 / -551 ft elevation) usually takes me 1:35-1:45 total time (12.5-13.5mph moving average). It also takes about 10-15 mins before and after each ride to get prepared (lights, locks, change clothes, etc). I think this mileage is perfect, and could probably do as much as 25 miles one-way if I had to. Anything more would probably start taking almost too much time, but that's personally thinking for myself.

If I had a 40 mile one-way commute, I'd either drive half way and ride the rest, or leave my car at my destination and ride one way each day.