I may be answering a totally different "big picture" question here, but ...
It sounds as if you and your hubby aren't on the same page concerning how to settle the baby. It happens to a lot of couples -- DW and I have to work at comparing notes, and because I am away much of the day I have to pay attention to her status reports (for example, DW and LO demonstrated today how LO is just about to master pulling up to a standing position, which affects a lot of things). There are some days when I simply don't have "the magic" and DW does (and vice versa), and there are plenty of things I used to do (but yawning and playing possum worked great at 2 months!) that I've had to discard. By the same token, I tend to dare DW by example to try things like PU/PD that she wouldn't otherwise.
If hubby really wants to learn how to help your LO to sleep, rather than just pinch-hitting for you on a dire-necessity basis like when you were sick, he should be amenable to listening to some of your advice. It's statistically likely that you spend somewhat more time than DH with your LO, so your advice should count for something (I agree that a window might not be a great sleep crutch LOL). Maybe you could persuade him to read excerpts from Tracy's books?
But it may be [putting on flameproof asbestos suit here] that he's simply "not that into" baby sleep issues and doesn't want to learn a better way -- it's apparently not that uncommon in fathers, for better or worse. If that's the case, you could allocate yourself all the putdown tasks and, so that you can gain the knowledge and stamina for that important task, put DH to work on ancillary baby duties: have him fetch or prepare one or more meals (or make it so that you can do so more easily), have him pick up your shopping list, or something else that would be helpful. IMO it helps mental health if you can all feel like you are on the same team (Team Baby! Go go go!) -- not everything has to be about both of you being perfect at getting baby to sleep. And it's quite possible that in time he'll volunteer for some of the other tasks (how about solid food feedings?) when he sees that baby is turning into a little girl -- never forget that this is all temporary.
One thing about having two parents living together with baby is that each parent can be "better" at some things -- meanwhile, your LO gets the "best" of both of you at all things! Good luck!