@NoName@Etexhorn13
1. Don't buy the cheap diapers. For the love of all that is holy. Luv brand diapers suck ass. We found Target to be the best bet on price and reliability. You can find them on sale every now and then and just stock up. Also, Target baby wipes are pretty good and reasonable priced too. Buy the biggest box you can buy when on sale. Don't buy expensive clothes. They will grow out of them so fast and only wear them once or twice before it doesn't fit any longer. Also, "Just Between Friends" is another one of those discount sales (around most major cities I believe - or at least the Houston area) where you can always buy stuff for cheap. If others are saying Costco has great options, go with them because they'll be cheaper. We weren't Costco members when we had our kid in diapers.
2. We used reusable diapers but not as diapers. We used them as burping cloths. Baby spits up, just throw it in the washing machine. We still have like 30 of those things.
3. Seconded or thirded the "my breast friend" pillow. My wife breastfed our son for the first year on that thing. If the kid spits up on it, you can take off the wrap thing and throw it in the washing machine.
4. Take some blankets from the hospital. They're free. And also take a booger sucker.
5. We never had any luck with a good forehead thermometer. We just did the rectal thing. Make sure the baby has their own thermometer for this reason.
6. If your baby gets cradle cap, I believe it's coconut oil that you can rub on it kinda like shampoo. Takes care of it lickity-split.
7. Get a good baby monitor. We bought this one (twice - dog broke the first one and it was working great after 2.5 years): https://www.target.com/p/infant-optics-video-baby-monitor-dxr-8/-/A-52918573
8. We ordered our crib off Amazon. No pillow, no blankets, no bumpers, just a mattress. Get a few sheet sets. This is the one we bought - has three different heights and converts in to a toddler bed: https://www.amazon.com/Delta-Children-Bentley-Convertible-Espresso/dp/B00LZY8804/ref=sr_1_17?dchild=1&keywords=baby+crib&qid=1629433144&sr=8-17
Last but not least: 9. Get a good carseat from a major manufacturer (Graco or the like). Car seats for infants come in two pieces (a base and a seat). The seat is removable from the car and you can carry the seat around with you (some even come with a stroller that you can attach the seat to). This is pretty handy but we never used ours. One thing you can do is get an additional base for your car (so a carseat/base and an additional base). Just throw the carseat in to whichever car you want to take. Makes transporting the family easier.