since you have many questions, and seem to have plenty of time now, you can read posts by Andy Cutler.

http://home.earthlink.net/~moriam/ANDY_INDEX.html

Chelation can be done for up to a week at a time if you can tolerate it, however one should start with 3 days at a time, then 3 or 4 days off before starting again. If one goes several weeks with few symptoms, then they can add a day to the next round then perhaps several weeks later add another day. My advice is to start slow, and stay with 3 days on and 4 off for a while before adding days. The important thing with chelation is to take the dosage every 3 hours for ALA, or every 4 hours with DMSA. If one is taking DMSA plus ALA, they can take both of them every 4 hours to make the dosage schedule easier. It can be though getting up in the middle of sleep to take chelators. That is why some people chelate over the weekend, so at least most of the round they are not working. It also helps to not be working most of the round in case you have bad symptoms.