I think babies need to get enough sleep early on. My LO is also 5 mo old - she goes to bed at 7 pm...I know this sounds counter-intuitive, but the later they go to sleep, does not mean the later they wake up. Usually it is the opposite - if they are over-tired, it will be harder for them to fall asleep and they won't sleep as long or as well. My LO doesn't sleep through the night yet, but she is almost there...I can go through the night without feeding her sometimes (I wake her up before I go to bed around 11 or 12 to give her one last feeding sometimes) - other times I will feed her once around 2 or 3 am and that will get her to around 7 or 8 am. She will still wake up, but I can get her back to sleep with a paci or rubbing her tummy.
That is amazing you can feed her for an hour! My supply doesn't last that long.....if it did, maybe she wouldn't need a middle of the night feeding.....but once is not that bad. She is still little! :)
My LO is close to mommy too - so I always put her to bed (my husband usually doesn't feed her bottles either), but usually I stick to feeding her, then singing to her, rocking her, and she falls right asleep...if she has a hard time, sometimes I lay her down with a pacifier and a lovey and stroke her forehead so her eyes close and will lay her hands down so they aren't going crazy - I don't nurse her to sleep because I don't want her to be dependent on it...so, maybe on nights when you have time, try changing up her night time routine so she doesn't nurse to fall asleep, but only nurses to get fed and then try rocking her or singing to her and then putting her down. This takes a lot of patience because I will sometimes have to hold her hands or stroke her forehead for 10-20 minutes, but then she will fall asleep. I prefer not to let her CIO....but it has gotten so that some days she will just fall asleep on her own, and some days I will leave her in the crib and go brush my teeth and if she cries I will come back and give her a pacifier and then go wash my face, come back, etc....so she knows I am there, but she will eventually realize it's bedtime and go to sleep....
Once your baby isn't reliant on nursing, it will be easier for you to be a little more flexible with her schedule. Then maybe your husband can put her to sleep on the nights you have to work - and she can go to bed around 7-8...you can come home and give her an extra feeding before you go to bed if you want to cuddle, etc...and she should go back to sleep easily (just keep the lights off).
One more idea - see if she will let you feed her a bottle so she gets more used to it before your husband tries....so that way he can keep with a routine you have already put in place. Or, just put her to bed early on your nights off and go with the flow on your work nights - we have late church on Weds also and my LO does fine on those nights...however, I think you're right in trying to give her more sleep - a lot of people think their babies get enough sleep, but they actually need more than they're getting....
Good luck!