bowlfull I would just manage as you suggest and not invest in the double-buggy. Such an expense and you will probably find that you end up using it as intended only a few times. You are not going to have your baby for another 6 months and 6 months is a lot for a little boy! Your DS1 will grow up and change so much by then and will be happier walking for longer. With DS1, I used the buggy until he was about 2.6 and then he totally lost interest and was just frustrated if he had to sit in it. The scooter days arrived...
On a different topic... I understand people plan a bit once the scan shows it's a girl or a boy. But suing the hospital seems a bit excessive... they always warn you it's not 100%, especially if they think it's a girl. I bought a lot of neutrals last time, just in case, although they told us it was clearly a boy. (also because I love other colours, yellows, greens etc... :-)
What a b of a headache today, honestly... is there something in the air today?
Still, really excited about my first preggo yoga tonight and meeting some other local mums! DS1 is already almost 5 and most of my NCT friends had number 2s after 2-3 years so I'm a bit behind! I'm already planning my maternity leave and mummy coffee mornings as you can see :-)