I don't think colonics can hurt you if done a couple times a year or so. I think it can help. But MeShell, because of your situation (surgery) I don't know if it's such a good idea. Your GP will guide you there, I guess.
I also disagree with those experts who say you should go 3 times a day. There is a really good and well respected supplement company that does lots of gut and intestinal cleansing products that I think are just great, *but* they keep going on about "3 times a day". I eat a gazillion portions of fruits and veggies every day (I'm almost vegan) and go only once a day. Sometimes, but rarely twice a day.
Also, I am really interested in Ayurveda and it seems for those who are Kapha types, once a day or even less is probably inline with that constitution.
Vatta people are prone to "dry" imbalances, constipation being one of them and so they need more oils and more water in their diets.
Pitta people rarely suffer from constipation unless they are having a Vatta imbalance.
MeShell, maybe a few times a week is OK for you? Maybe try introducing a bit more oil into your diet? Since you don't like water, I'd definitely step up your half water, half juice intake.
(By the way, I'm no expert in Ayurveda, just someone who is really interested in it and reads up on it)