ideally yes, we wouldn't need to detox, however, because of all the chemicals, pestisides, hormones via food chains, our bodies do get overload.
Our bodies may adapt & they may not.
My 'holiday' was a fantastic experience, not sure I'd do it again there, or for 2 weeks. It's certainly a talking point.
I would be careful of going into 5 days a week excercise - unless you are already exercising regularly, try building it gradually. If you are serious about doing a 'detox' - to whatever level you are comfortable, then excercises like yoga/pilates & swimming are better.
Whilst none of us know what your lifestyle is like (ie smoke, what you eat, what products you use), you will need to take it easy & help your body to recover/refresh itself. I'll post the name of the detox book I have, which is very detailed. I followed it for a couple of weeks (my version!) & was swinging from the trees.
If you actually do it, agree it's important to maintain the changes, so don't try to do something that is too radical. One of the hardest for me is giving up caffiene. Ideally I would have just one cup a day.
The juicing sounds interesting - although I don't think I could do it in cold weather.
Ref colonics, each to their own, but it's a good start to a detox - especially if you taken antibotics/ad's.
If you do have them or at least one, then you'll need to have a good probiotic - in a non-dairy form & something that you need to refrigerate.
Let us know how you get on !