Since this is in the social section I’ll give some input, although my mum was not single ‘by choice’ – Unless you can afford childcare whilst you carry on working, it is very difficult financially, like @Blackberry said. I’d also try to get good childcare rather than just a baby sitter, i.e. someone in it for a long time, reliable, who would like to bond with the child and help them develop. Effectively, you wouldn’t be parenting the child alone as they’d need other connections and role models around them.
It can be done, it just costs twice as much, but any parent needs to think about finance and whether they are mentally and physically capable to look after a child before doing so, whether they are single or in a parenting couple. I wish any one good doing this good luck and a lot of love and to seek support from friends and family rather than taking it upon themselves entirely alone.
Were you referring to this organisation by the way?