OP some things that helped with the sleep deprivation... co-sleeping with the baby, and you can breastfeed lying down with the baby at the right level. Here are some tips kellymom.com/parenting/nighttime/familybed/
Carry on with feeding to sleep, there is absolutely nothing wrong with this from what I've read, heard and experienced. Ignore the baby manuals, as your baby has not read them!
There is a thing called dreamfeeding...just before you go to sleep yourself (let's say, 11pm) gently pick up your sleeping baby, and latch the baby on to your breast. If you hover the baby's mouth around your nipple, the baby will latch on and start feeding. Once the baby has fallen asleep again, go to sleep yourself. You just bought yourself a couple more hours of sleep, because your baby's tummy is full for a while. It's so scary the first few times you do it, but it really works and saved my sanity :)
Night weaning is not a magic bullet. Here are some more tips kellymom.com/parenting/nighttime/weaning-night/
Ask your husband to do bath time, which includes bathing, getting the baby ready for bed, and reading a story or two. During this time, you sleep. He brings the baby into the bed and places it next to you or in the co-sleeper.
Ask your husband to take over for a 4-hour period at the weekend. Getting 4 hours in one stretch is an achievable goal. Your child will not suffer. If you can pump some milk beforehand for your husband to have on hand, so much the better.
Batch cook. Make double/triple portions of meals, and freeze the extras. Saves you time on cooking, which can be spent sleeping :)
There are lots more things, this is just what I remember at the moment. My thoughts are with you, hope you figure something out.