For $50,000 would you

no...wouldn't be volunteering if you're getting money to do it...

would you eat only ice cream for a a month?

probably.

Would you eat strictly raw foods for a month?

Yes. I can live on sushi and salad

Would you not brush your teeth for a month?

Yes... id eat apples

would you drive almost non stop around north america for 7 weeks straight, every day, 1,000 kms?

for $50K of course! just need pee breaks

Would you stay on Mars for a week?

no

would you start a bar fight with someone who is at least twice your size/strength?