I've done many same projects in the past for about 18 years and have written LISP programs for AutoCAD automation in different fields and for different companies.
I think can do the job if understood your needs completely and also can write some extra AutoCAD LISPs to simplify your tasks. ( What I've done in all my projects.)
Therefore I'm sure to be the perfect person for your job.
As I read your message, I'm almost sure to be able to do your task as I've done same in the past. For complete assurance, please send me a sample DXF ( not DWG ) file.
DWG file can not be read and worked inside, but DXF files can.
But to save the time, I recommend you to start the job and you will see soon the quick progress.
Waiting for your kind reply
Sincerely Yours,
Bahareh