Can you visit some garage sales in your area? A friend of mine had twin girls, she managed to pick up almost everything she needed from one garage sale where they had twins so had two of everything anyway!

I'd probably suggest getting a rocker/swing for each of them. Can you try Vinnies/Salvos for blankets/wraps and some clothes? The baby stuff they have is usually in great condition (most 2nd hand baby clothes are great because they never wear them for long) and it's cheap.

Check out prices for hiring baby capsules but TBH you might just be best buying them both a reversible car seat (from newborn - toddler) that way you aren't paying for capsule hire as well as a car seat later on.