How much can you afford to put down for a possible purchase? This is important, because if you happen to lose your job or something, you don't want to be upside down on the car because of depreciation.
Think long and hard about this because it could be a 5 year commitment. From your notes, you say that you will fill up once a month which means you won't be driving it that much. Does it make sense to have a 65k+ depreciating asset sitting in the garage?
If I were you, I would not make this purchase at this point in my life, but this is my personal choice. I would not buy a car that I could not pay cash for.
Good luck to you!