I dont know the answer to your questions but a quick reading shows either a cautious person or someone who escapes from uncertain issues (squabbling kids, new baby).

I wouldn't do it. Have a kid and live separately in a marriage that is.  

So I'm the one in my relationship that wants to live apart. And I have straight up left the house because I couldn't handle the kids fighting. Just to offer my perspective from the POV of the person who doesn't want the whole blended bliss, I'd say that it's hard to balance different family cultures. I have different rules/expectations/parenting style than him, and it's hard to watch their dynamics. It doesn't feel like family to me, or in fact it does: it reminds me of the way I grew up, which I hated. Part of it is very much me and what triggers me about my childhood. Hence my need for more space. Also, I'm definitely an introvert and that's a family of extroverts. We just don't all mesh naturally. I also said no to his desire for another kid. I already feel maxed out with where we are at in terms of number of kids, and I also just couldn't personally deal with seeing one of my kids full time and the other only half the time. Of course I don't know exactly why your DH feels the way he does and may be generally conflict avoidant, or he's an introvert and gets overstimulated by the fighting, or it brings up childhood stuff, or its not the way he wants family to look/feel for him. There's a lot still to find out there, and 6 months, even 6 intense months.

As others have said, don't talk yourself into it if it's really not what you want! 32 is totally not that old! You really have years and years of fertility left! But if you want to live separately for the time being but explore what cohabitating might be like in the future and/or how to keep those separate domestic boundaries, here are some thoughts:

1) Definitely have a neutral way to check in with the relationship, like a date night every few months or so that asks Where do want to see our relationship in another six months? Is there anything you need from me? Etc. That way you don't over-forecast the relationship but can make small steps towards further types of blending, even if it's not one big happy family.

2) Try sleepovers! We first did a classic sleeping back living room sleepover the first time we did it with the kids. Like it was a thing we all got to do: movie night, pjs, staying up after bedtime, etc. It's a way to introduce the fluidity between houses that's low pressure for the kids.

3) Baby steps. Try combining small things, like a shared Netflix account or ways in which the households have a connection. We also opened a joint checking and did small automatic transfers so we had a date night account, or if there was a shared expense, like someone going to the grocery store for making dinner at home, or whatever. And if you don't already, introduce drawer space and closet space and other things that take those baby steps towards more household sharing. Maybe even make a list of small steps and ask your BF which of them he feels most comfortable with, start there, and work towards more unity, even if the households stay separate for awhile.

Hope that helps!

If you said you'd been dating for 2 or 3 years, I'd think it was time to take the next step, and I'd have some concern if he wasn't ready to move forward. A long term live apart relationship with kids that young wouldn't work for me.  It's not like you're just waiting a couple years for them to turn 18 - the kids will be around for a long time.  But 6 months is hardly anything.  I can't blame him for not wanting to move in together yet, especially when there are kids involved. 

I can blame him for making the good luck finding someone else comment.  That's just mean, and very uncalled for. Sounds like he runs from conflict/things that aren't comfortable and doesn't fight fair.  I'd pump your brakes and let the relationship evolve. He might not be the one for you anyway. 

6 months is nothing, and it sounds like you want the next step and he doesn't.  Don't force a relationship just to have a child - you are 32 and have many more years to find the right guy (plus you do already have one child, so it's not as if you'd be childless if you don't have more).

I think if he has his own home, it's pretty normal and expected to just clear out when the kids are fighting to get some space. I'd suggest you slow down and really take your time to get to know this guy.  Please don't have a baby with him right now. You have at least 10 more years to get pregnant again.

I think that it is a last resort kind of thing, to live apart-together. 

I think for a temporary long distance for a job, while getting settled or a temporary situation is no biggie. Long deployments as a military spouse (yep those suck) but we deal. If it is because there is something big going on within your household- One child is a danger to another, you or him/herself then it might be the only way. 

However, if it is just because he likes the status quo- that is a cop out weak-ass excuse so that he can have sex when he wants but maintain a mostly single lifestyle.