We have that as well, same sort of numbers. When I got my new PC they dipped it in the Autodesk bucket, it had everything on it, probably about £20k's worth at retail. Been forced on to Revit, god it's shit.Luckily our firm has a global subscription to AutoDesk which covers all products, for around 4000 seats I hate to think what it costs.
I did as well. Although I picked a site that dried at low tide. An hour with a borrowed total station (I used to be a surveyor) and we had the lot. Just downloaded the data logger and let the software do itAs others have said, AutoCAD is not the tool to use. Although, I did my dive site map for my DM in AutoCAD as a 3D model so I could do sections and contour plots