If you think things through logically before having kids, there will be no ideal time.
There will always be something that you want. Whether its a new house, renovations, promotion, new job, new pet, big holiday.
A child is a big commitment and will impact your life no matter when you decide to have one.
I went off contraception and didnt try, but when it happened, it happened type of thing. It took me around a year and a half as depo takes ages leaving your system.
I was 23 at the time, nowhere where i wanted to be career wise or have a house of my own. Fast forward 7 years and my career is still progressing, I am still saving for a house though (I became a single mum when he was 2)
I have friends now same age as me, at 30 who still dont have kids, they have a house, career etc and only thinking about kids now. Unfortunately 2 out of 3 of them have fertility issues and now need IVF which theres a long waiting list for and is too expensive to go private with their mortgages etc.
They'd be better resourced for a baby than I was and still am, but unfortunately it may not happen as easily now.