I got away with just a stroller and a sling (ring sling and ergo) for at least the first 6 months after #2 was born (and #1 was 19mths when #2 arrived). I would take the Ergo and the ring sling cause I had a lay-back stroller and if bub was sleeping and toddler was restless in the pram, I'd pop him on my backin the ergo and the bub in the pram. I also ended up getting a skateboard for the back of the stroller so that toddler had other travel options.

I only recently got a 2nd hand double stroller (umbrella style) because #1 and #2 fight were starting to fight as to who was going to go in the pram.

Also, #1 wasn't a fan of the stroller early in my pregnancy with #2 but was much more open to it by the time #2 came along. Maybe this might happen for you.