The base has to be designed such that it can modified to have

1. Replaceable Motors
2. Caster Wheels
3. Batteries
4. Battery Management System
5. Main control system
6. Microcontrollers
7. Sensors of various types (listed elsewhere)
8. line tracking sensor strip
9. Hidden wires ducts
10. IR sensors on all sides
11. Communication devices of all types
12. Ducted individually controllable LED strip
13. Custom Wheels
14. LCD for display of critical health
15. Buzzer
16. Buck boost convertors

Some initial sketches: