Hi!
I have years of experience working on this kind of projects, and I can do it in a day, start to finish.
I have seen the model screenshots, and I can see that is has been imported from autocad, without any (or almost any) changes.
I will create completely new model based on this one, with correct topology, and all changes you require.
If you keep this current model, you will have a lot of trouble making it work in 3ds max, since topology is completely ruined, and you won't be able to map it properly.
Let me know if you are interested in my proposal.
Thanks,
Jovan