Advice please

So next year march i will have a new born and a 1 and a half year old. I really wanted a double in line stroller that will have adaptor for capsule and also isofix then able to change to double toddler seats later on. However its extremely expensive.

And i dont want twin stroller as its too wode and again still need the capsule to attach.

How do mums manage to transport their 2 children that will both need a stroller, 1 needing a capsule.

Is there another way to manage this?