Rear Side Windows

Hello Forum how is the times going on in here? Lately i have been studying about the BMW M3 E36, at this time i am 22 years old. if i get the blessings i am curious to know what my options are with this sort of car. from what i have noticed from reading in some forums i see that the 95 m3 can be one of the best and most friendly upgradable sort of car.i dont know what my future hobbies for a car is but i doubt that ill routinely use the power that can be modded inside of one of these automobiles. in my view what makes this car special is that its not a corny or common sort of automobile, from what i understand this car can be strongly built, but can also be costly for minor problems as well as modifications that you can find in this car. even though the car is not meant for drag racing (from what i read) the car can pull as much as most perfomance cars that weigh 500 lbs or more, and can sit 5 people as well. but what gets my attention this car can also be more costly to upgrade/repair compared to most of the performance cars that weigh like 500 lbs more that we see on the street that cost 30k or below.

this has been bothering me for some time but since i notice that the m3 can sit 5 people i am curuious to know if the car can have rear side windows to roll down like the convertable m3 version. does anyone here know what price it can posess to get the thing done.

any help or suggesions would be appreciated
Thanks
streetsailor