My van is 8yrs old its still in good condition, very reliable (sailed through last three MOT`s) as long as it looks good, nicely sign written thats all that matters.
Vans dont clean carpets.
You need 3 things to clean carpets
1. Good equipment
2. Good chemicals
3. Good knowledge
If you have not got ONE of the above, then you are F##ked

Daryl