When I think of children, I think of how much planning is needed if you want the best for them. The expenses are one thing, but as Adun mentioned, you got to raise them right.
The crux of that problem is the balance of funds from working, or to actually parent + work, I think its extremely difficult to balance that appropriately. When you have both parents working, or wanting to work to fund expenses, do you hire a babysitter or actually sacrifice your job and possibly career to parent?
So far, its looking like a babysitter thing to me, but it'd probably leave a knot in my stomach having a friend or stranger take care of my child while my lover and I work. Relatives don't work for me either, as I don't trust my relatives due to a silly feud with a step relative that blew up into an entire family split that involves me in the middle of it w/o my decision.
It really bugs me when I feel I don't have the groundwork laid out for the early care thing alone, but it may just be only one working for the duration of the first few years for my child and then talks of babysitter afterwards.
Raising, I think I have everything figured out. I think I'll have my child practice Catholicism and pretend to practice it as well for a while. It's something I think I can pull off, as I believe there are some great values in a child learning religion as a means for them to better themselves as a respectful person to society and to be kind to others. Afterwards, I'll let them make their own decision through their knowledge and such.
The later years will be worse, with the constant worries of the usual teenage problems and stupid things they do to amuse their silly minds. I'll have to be a hard-ass and try to do things that'll likely make them hate me and endure their swearing or whatever the hell kids will do during those ages. I don't plan on letting my child get away with things and have harsh punishments and lessons. That's just me though...
If its twins, that'll just be double the trouble/problems and I'll have to make them get along with each other.
I'm hoping to hold off the parenting thing for a few more years at least though...