Thinking of getting a 2nd dog... (am I crazy?)

So, we have a 16 week old female Akita/GSD puppy, Luna. We originally planned on getting two dogs, but decided to start with one.

Lately, I've been getting the urge to get a 2nd dog. I know most people say to wait until your puppy is 2 (or at least 18 months) before getting another one, but I found a dog that seems like he will be a good fit.

My husband and I had discussed getting a Siberian Husky before we adopted Luna. Then, we planned on getting a Sibe puppy from a reputable breeder after Luna is a bit older.

Now I stumbled upon a Sibe that some people are rehoming (he came to them as a stray, they cleaned him up, searched for the owners, and now are looking for a new home for him).

They said he is 1.5 years old, good with dogs, cats & horses, housebroken/crate trained, and knows his basic commands. If so, somebody took a lot of time with this boy...

He sounds too good to be true. I've emailed the people with questions (was there a vet exam, any health issues, is he neutered, etc.). Can anyone think of any other questions I should ask?

More importantly, am I completely crazy to think of doing this? If we decide to go ahead with this, we'll bring Luna over to meet him prior to making a final decision (he's located about 3 hours away from us)... although I'm a little leery of doing this if he hasn't had a vet exam...