I'd like one or maybe more, either would be just fine.
I'd like at least one kid, but more than that would be fine too.
この場合、次のような言い方ができます。
ーI'd like one or maybe more, either would be just fine.
「一人かそれ以上、どちらでも構いません」
either would be just fine で「どちらでも構わない」と言えます。
ーI'd like at least one kid, but more than that would be fine too.
「最低一人、でもそれ以上でも構いません」
at least one kid「最低子供一人」という言い方も覚えておくと良いですね。
ご参考まで！
カナダ 
