Regarding Model 3 Volumes
Tesla plans to get to 5000 cars/wk in Q4. If they achieve this mid-quarter, that leaves ~6 weeks at 5k plus a previous 18 weeks of potential production at a much lower rate. I think 500/wk is generous for the previous weeks because the first couple months will probably involve making 50 cars, tweaking the line for 3 weeks, and then making another 50. So I think 39k Model 3 in 2017 is a good-generous estimate.
More conservatively, I see Tesla getting to 5k/wk in mid-December, with 1-2K per week for the proceeding 4 weeks and then maybe 2k cars total for the 18 weeks before that. So that would be 18k Model 8 in 2017 and deliveries of about 2k.