I feel a bit sad for the OP but I'm going to lay it on the line: 1) your price is not locked in. The CT currently cost 2x what the tri-motor was promised at. 2) the CT is their newest and best tech. Think about that for a long moment. The CT, which real world gets about 1/3 of the promised range, is their best effort. 3) Musk has a long history of over promising and under delivering and he'll do it again. That will absolutely include more $, less range & low quality. It'll also depreciate massively unless builds are very low production.
Porsche currently builds phenomenal EV sports sedans and in real world range tests Porsches commonly get 30% ABOVE ratings.
Truly sorry that you did this deposit thing. You lost at least $100k. Furthermore, Musk made at least $100k on your money, so you absolutely have already offered to pay $350-500k for this car, IF they actually sold it to you for $250k.
I don't know your life history, but this is likely the largest financial error of your life but don't throw good money after bad.
GL.