i recently put in an order for an all wheel drive, long range battery model 3 (6/28/18) for all cash payment. if i put down 50% and payoff loan in 3 years, would it change the delivery time?

No change to delivery time so long as you pay in full. Can pay from your account or from loan company.

Your payment method will not affect your delivery time. But in order of preference for delivery, I would suggest the following: 1st - Model 3 Performance, 2nd - Your Model 3 LR with AWD (or dual drive), and 3rd - LR single drive, and very much last, base Model 3.

It can delay your deli time

No, you have to wait in line like everyone. Only way to get bumped is if you are a current owner if a S or X