Hi lorrmill, I've read both your posts re drug dependent babies and I can only give you my experiences.
I can't say how you would cope only how we have.
If you search/read my thread entitled Drug dependent baby, advice needed it will give you a taste of whats involved.
For the majority of our fostering life Dh has done contract work which entailed him working away from home and only getting home for a weekend every few weeks so it's been pretty much "my thing" if you see what I mean.
When we took on our current drug withdrawing baby Dh was between contracts so he was at home to help me.
There wasn't a single day for the first 6 weeks or so I didn't thank my lucky stars he was with me because I honestly don't think I could have coped alone.
I know there are many single carers, to all intents and purposes I am one most of the time, but a baby on morphine is a whole different ball game.
You cannot imagine the constant screaming which there is nothing you can do to soothe, the almost non-existent sleep, imagine giving meds to a tiny baby when you can barely see and you get an idea of how much more difficult drug babies are to care for.
Having said all of that I can look at our lo now and feel an enormous sense of pride and achievement that we got her through it.
Good luck and please feel free to ask any more questions you may have.