P.I.
Hi
I bought a seat2go from litaf and attached it to a double snap and go for the first 9 month or so. my older daughter could either sit or stand on it, very convinient and cheap.
Now I have double umbrella stroller and put a buggy board for my older daughter in the back. She was 3 and the twins 10 month when I started that. It is not a set up to go on long walks but very convenient to have all three in one small space if you cross streats, in a parking lot or in the mall.
I also have a safari double jogger where I can place one child in the middle in the front without additional seats. Works great.
Good luck.
I am convinced you will not need an expensive stroller. Soon they will run mostly around and you will only need a stroller as a short back up.