That trukk is dead. If you have first turn it may work.
Battlewagons want death rollers.
Looted wagons are not so great, compared to the rest of the things on offer.
Nobs need a bosspole. You may to separate the warboss.
Then your foot slogging lot belong to a different list.
You will find it easier with 3 battlewagons with death rollers. This spreads risks, gives your enemy something to think about and they are harder than trukks.
Given what parts you should have lying around:
Make lootas using the
AoBR boys and the loota parts from the burnas. This should be 2 units of 6.
Then get an
ADL with quadgun, the grots will love firing it.
More lootas and kannons will work well here.
This will give good support to the battlewagons.
Another direction would be 9 rocket buggies to support the battlewagons. They are cheap and good at killing.
What army does your friend play? I would say just go for it.
dreads and kans are not really units I would ever pick. Tank bustas are cool, remember a hammer or 2 and all the bomb squigs.
Good luck