cant say anything about the price of denting since i haven't seen the car my self but now arshad charges around 40 for pan up body work.But arshad is a master doing the work
Khalid is fair in his rate for mechanical his rates are fixed and also justified as well.
for paint i would rather prefer getting it done from some place else.The guy who painted my car left ,Although he did a good job but after alot of hassle and if i am not wrong he left the job and personally i didnt like the work done by the new painter .Paint cost between 25 to 40 depending on the quality you want,i paid 40 k back then .
During paint make sure to get the antitrust treatment done and DONT GET IT PAINTED DURING MONSOON Rains.
for interior go to baho mahala guys name is also khalid not sure though he quoted me 18k for my friends bug 6 months back.
for lowering i would recommend this for front (i started the modification on a beam i bought from kabar,couldnt fit it back since i had my uni started and had to go abroad)
TheSamba.com :: View topic - Monroe Air Shocks
The guy is using monroe air shocks with a car tire pump in order to raise or drop the front end.
since you are planning to lower make sure you do all the calculations such as tire size.too big will rub too small will not look good