SL 350 and 500 cost check ?

Hello dear forum I am currently owner of a Slk 200 and the thing is just too small for me and has too little performance therefore I wanted to buy a Sl Bj 2001-2003 he should be black kK stood about 100 000 to 150 000 Ca 17 000 Euro available Now I wanted to ask what the monthly costs are at 350 and 500 and a pro and contra read have Sl 350 with about 250 ps not too little ? I am 21 years old and earn nearly 2500-3000 net ( living with my parents large House ^^ ) dare would not be registered in my name. I wanted to know what an SL really monthly cost I would charge with 500-700 euro reserve I would save myself at any time about 4000 euro if it gets expensive I know it exemplified many reports but somehow I find the slightly exaggerated with monthly cost of 2000 euro etc… If the dare really costs more than 1000 € monthly then the car would be nothing for me since I still have a few other dreams ben except the car I ask for all the advice Mfg Delter