How old are you both? If you guys were young (say late teens) I could understand him saying he wanted to wait 10 years, although I can 100% see why you wouldn't want to! As you guys have been together for 5 years him asking for another 10 years to settle down seems excessive. Most people (at least in my experience) have at least moved in together after 5 ears- it sounds like you've been more than patient! Obviously he might change his mind- a lot can happen in just 1 year, people can go from thinking of kids as a maybe, way down the line, to wanting to ttc. And if he is young then that's probbaly more likely. But I would be very cautious. A friend of mine was with her OH for 11 years. He knew she wanted children and kept fobbing her off, saying they would make a plan once they'd earnt a certain ount, reached a certain age etc. When she hit 31 he told her he didn't want children and never would (he was older than her too). She was devestated (of course) and ore so when he said that he thought once she hit 30 she'd feel too old to have children and basically wanted to trick her into staying with him and not having kids, despite knowing she was desperate for them. Pure selfish. Luckily she is with a lovely man and has a little boy now. But yeah, I would worry about that happening. If you think you can wait longer then I'd "counter offer"- explain that you absolutely do want children and that you aren't willing to wait so long, say that you want to sit down in 1/2/5 years and re-evaluate how you both feel and where you go from there. Obviously the decission to have a child has to be both of yours but that doesn't mean you have no say in when it happens or what you can do to make it happen sooner.
Good luck!