If you are not going to use PDMLink Change Management to manage your CAD Models and Documents, agree fully with Ben, look into using IntraLink. Also PDMLink 10.1 M050 is the 1st version of 10.1 that support the use of Creo 3, recommend you use 10.2.
Some questions: (all rhetorical to help you scope your project)
1. Have you purchased your Hardware for this PDMLink instance? What is the procurement process in your organization? How long does it take?
2. Do you need to train your user on Creo 3?
3. Where does you CAD Model data currently reside? Is data migration from source system to this PDMLink target system in scope of this project?
4. Will you publish representation for your CAD Models?
5. Will the consumers of your CAD Drawings access this PDMLink system?
6. Will you also manage WTPart and EBOM within this PDMLink system?
7. Backup and recovery procedures for this PMDLink system?
8. etc...
Suggested reading to begin:
a) Windchill Architecture Overview
b) Windchill and IntraLink 10.x Server Hardware Sizing Guidelines
c) Windchill Deployment Planning Checklist
d) Using Creo Parametric with Windchill
etc...