A glass of wine (or 6...maybe more) may help quiet that 'common sense' voice in both your and your DH's heads...
...so you can get the playmate you want NOW...
Seriously, It's a decision that every individual must make based on their circumstances. But, I do understand wanting a Yorkie playmate for Chewbacca, too.
We got Brody when he was 14 months old, then a few months later, we puppy sat for our friend's Shih Tzu, and Brody, who only had a 1-yr-older, 95 lb non-playmate 'brother' was so forlorn after having a same size, near same age, same energy playmate for that week or so, there was literally no choice in my mind but to get him a 'like himself' friend and companion. I missed out on two rescues. One was a Yorkie/Maltie mix male because the rescue never replied to me (email was the only way to contact them until they brought the rescue dogs to PetSmart on Saturday)...but he was not there and was removed from their website so I assume he was adopted. The other was a Parti Yorkie male who was a little too far away but...
. As luck would have it, I then found Mia, took Brody to meet her, they hit it off, and when both Brody and Mia were 17 months old...their birthdays are 6 days apart...Mia joined our family. Brody and Mia have been inseparable since then and are very good together.
I am certain whatever you decide, you will make the right decision for you. Good luck!