You may want to look further into this prior to implementing such a program. With Model Files in such a system and checked out to an individuals c:/ drive you will not be live across all models while working. Meaning if you xref other models while working you will not see any changes made to that model while working. As far as Isogen you may want to relook at that also. If you default Isogen to output to somewhere like that you will have the designers placing all their test runs or bad isos into it while still working prior to being complete with those drawings. Just some food for thought in working drawing being place in a doc management system.