So basically my question is how fast does it take for marijuana to get out of your system?
Theres no telling. Each persons body is different and there are too many variables to take into consideration to arrive at an estimate. Only periodic testing with a THC test kit (using the first urination of the day for each test) can give you that answer.

Drinking water in the days before the U/A is of no help. THC is NOT water-soluble unlike other types of drugs. For more info, do a Forum Search with the terms "drinking water useless"

Exercise can be a good/bad thing. For more info, do a Forum Search with the terms "exercise dormant metabolites" and "storage mode"

Sweating is hardly of any help because very little THC is excreted via sweat. You could sweat enough to fill many buckets, yet the amount of THC being excreted would still be miniscule. The rest of them are being excreted via the urine and bowels.