Working on Maruti 800 Modification to a Strech Limo

[JammuClassified.com]

This is the concept I want to follow. The immediate questions are:

1. Should I keep 2 rear axle tubes or just one?
2. Exterior Target:
Add 2nd shell to increase lenght
2 Tone Pearl Colour finish
Underbody lights
Projector HeadLights
LED Taillights
Roof Rails
Spoiler
Crome on std Rims

3. Interior:
Partition between Front Drivers Cab and Rear Compartment
Red & Black theme
Sporty Steering
Modified Dash Panel
Roof, Pilars and Carpet RED
Red and Black Seats and same tone door panels
Laptop Invertor
Power Windows in Rear doors
DVD/VCD Pen drive stereo (in rear compartment)

3. Performance:
High flow Performance Air Filters
Performance Carbon Fiber Mufflers
Exhaust Tip
Air Conditioners for Rear Compartment


Please do let me know, at what cost can the Performance Products be
sourced.

The 2 shell welding is under process and I can give u the pic of the
real bare shell in a weeks time.

Please suggest cost effective solutions.