lexus is250 vs hoopty

[THATWACOKID]

ok so i'm a 19 year old student and i've made some money playing poker in the past year. i want to buy an is250 fully loaded which would be about 40k-44k. when i told my dad that i want a lexus he flipped the [censored] out. he goes on about how bad of an investment it is compared to me buying a 20k car. he assumes it will be a 30k lexus and says that if i take the 10k i would be 'saving' and put that in a savings account i would have 300k 30 years down the road.

i will obviously lose a little bit more money with the lexus, but how approximately how much more would i lose considering the following:

-higher insurance
-resale value (not sure if the fully loaded hurts/helps)
-other factors i'm not aware of that will effect this