I wouldn't mess with inter-state delivery of inventory vehicles, unless 1) you're not in a hurry, and 2) it's a particularly good deal on a vehicle with some mileage that gives you a discount vs. ordering. It's not at all clear that you'll get it any faster vs. just putting in a new order.
My story:
1. I had been talking to our local sales guy for a few weeks, made it clear that completing a deal by eoy was what was driving my timing (taxes). Also told him I knew shipping might be difficult to complete in that time, and that I'd be more than willing to fly to pick a vehicle up and drive it back home to WA. He said that would be no problem.
2. I found an x90d in LA that was most of what I wanted, with my 2nd-choice color and a few options that I wouldn't pay for in a custom order but was willing to go for in a quick deal. I put a deposit down on it on 12/19.
3. That evening I got the sales advisor to get the delivery advisor to call me, and DA said it would be too complicated to pick it up in person. He was 85%+ sure it could get to WA before the end of the year, and if it didn't, we could complete the paperwork anyway and still qualify for 2016 tax deduction. Based on that, I opted for delivery. A lot easier than flying down to LA and driving all the way back in questionable weather.
4. On 12/23 I called my delivery advisor and he said the car hadn't moved yet, but thought it might still make it. I didn't panic since I thought we could still complete the deal on paper if the car didn't arrive.
5. On 12/27 I called my delivery advisor and asked him to check on the vehicle. He checked and said it had moved, and was on its way! Exciting! So we set up a delivery appointment for 12/31. I also ordered all-weather mats and a variety of accessories for the car.
6. On 12/30 I called my delivery advisor to confirm it was still on track before I went to the bank to get the cashiers check. He checked, and found it was still in LA, in the same different place it was in a few days before. It wasn't going to make. "OK", i said, so we'll still keep the delivery appointment to complete the paperwork. "Sorry", he said. What he told me before about completing the deal on paper was not accurate, and only applied when a custom-ordered car was delivered to a house for people far away from a delivery center. There was no way to complete the deal in 2016, and no estimate when the car would arrive. He was very apologetic - the logistics team had let him down. Since they weren't out anything (the car was still in the same city when I ordered it), I asked him to cancel the deal. He said that would be no problem. It was also too late to get down to LA in time to pick up the car (I now had plans for 12/31, tickets now expensive, and no time to both get the cashiers check, get on a plane, and fly down).
On the plus side, Tesla staff were perfectly nice and conciliatory throughout the process. I wasn't out anything other than some fees to ship the mats & accessories I had purchased back to Amazon.
But it was frustrating that:
1. I had to initiate the conversation at every stage. There was no proactive outreach, and no visible sign that the process was being tracked or managed outside of me calling and asking
2. The information I had gotten initially was incorrect. I was totally willing to book travel down and pick the car up, but was dissuaded based on confidence that deal could be completed by eoy.
So now I'm on hold. I have a model 3 reservation and want to learn more about it in the next reveal. Based on that, I'll decide whether to wait for its delivery (end of 2017? early 2018?) or put in a custom order for an X100d Q2 delivery. The fact that a future X will be a 100d makes me not the least bit regretful that the X90d didn't work out.