It would be best to have necessities like: crib/bassinet, stroller, car seat, diaper/sanitary stuff bought by 30 weeks. You should also make sure you have a couple of preemie outfits (leave the tags on if anything) and at least 5 or 6 newborn outfits by the time you hit 30 weeks. Just so you are well prepared. Have your baby bag and hospital bag ready by 34 weeks and in your trunk, lol.
I bought most of my son's wardrobe by the time I was 28 weeks. Friends and family also gifted a loooot of clothes. Wish I hadn't bought so many! A lot of it he only wore once or twice and it went to waste. I would suggest buying a 5 or 6 sleepers, 2 casual outfits for sure (at the minimum) before baby comes. Rest you or your hubby can order online once baby comes. Children's place does 2 or 3 day delivery. If you have a lot of friends and family you are bound to get a lot of clothes