Do what I did.
Find a bird with just enough kids so we can't all fit in my house (2 bed). Rent my house out and move into a rented place together, thus leaving me with a home to move back into and my mortgage being paid in the process.
In all seriousness though, that wasn't what I did, I just happen to like someone who already had kids. I know one too many blokes that have been stung by this type of thing, it scares me and deep down, I am so glad we couldn't use my house.
We are now saving to buy our own house together and plan on keeping mine for a future retirement fund, should we last that long.