I had no problems with the bowel prep, but I didn't have a toddler at the time! You need to plan to be at home all day because you'll spend a lot of time on the toilet. If you can get someone to help you out (ie watching your toddler while you're on the toilet), that would be a good idea, otherwise, you'll have to make do as best you can. I found I spent the most time on the loo about half an hour (I think?) after taking the first dose. So, even if you can only get someone for a few hours in the morning (assuming your first dose is in the morning), you'd probably cope okay the rest of the day. I don't recall the second dose having as drastic a reaction, but maybe I've blocked it from my memory?

I was told that I will need a bowel resection one day, but thankfully not quite yet. It's scary knowing that it's in your future though. The recovery after a bowel resection is definitely longer. I needed 8 days after my first lap (stage III endo removed), but I think a bowel resection needs weeks to recover. My second lap there wasn't much re-growth and I only needed 2 days before I felt back to normal (and most of that was shoulder pain from some gas they didn't remove). Given the extent of damage you are expecting to find, I'd be planning for at least a week of you needing help, but possibly longer if they do need to work on your bowel. I'm not sure how long is required if they need to do anything with the bladder?

ps. Holy dooley at the $9k OOP! Mine were nowhere near as much, thank goodness!

pps. I stayed in hospital overnight both times, but last time I almost had to stay an extra night because my bladder wasn't doing the right thing after the catheter was removed (but it eventually cooperated late in the afternoon so I was able to go home).