This seems like a good idea as a prompt to get stuff done.

My current aim is 3k or so of painted EpicUK Death Guard, something like:
Death Guard Retinue
Death Guard Retinue
Daemon Prince
Land Raiders (for one of the above)
Defilers
Plague Engines
Plague Zombie Infestation
Plague Reaper or two
Plaguehound Titan
Having been strongly into Epic back in the day (Adeptus Titanicus through Titan Legions) I have a bit of a head start as there's almost enough Chaos Marines in Nurgle colours for the two DG Retinues , a Nurgle-scheme Warhound which would do the job after rebasing from it's current square 40mm Monster Base and a partially-painted Mortarion for use as a Daemon Prince.
Anyway...
In our 'learning the game again games' (mostly against brokenbayonet) I've become very fond of Contagion Engines and came up with some cheap and quick all-plastic conversions, inspired by the Bombard conversions in the Epic UK PDF.
Ingredients:
Old placcy Land Raider, the more battered the better.
40k Chaos vehicle Combi Flamer.
40k Chaos vehicle gun heads.
1mm plasticard

First, flip the Land Raider upside down and cut away the sponsons and the engine block area. Then cut off the Flamer nozzle and cable.

Clean up the Flamer and a suitable gun gargoyle and glue it on where the nozzle was, making sure to centre it along the 'top' edge so that it will end up centred in the vehicle.
As I cut the bottom of the Flamer totally flat it ended up slightly too far over to the right of the chassis, so some plasticard was added in as a space.
Angle the top front edge of the upside-own Land Raider and glue the gun in at an angle.
The result:


For variety I also have some done with SM Hunter-Killer missiles as the base for the gun instead of the Combi Flamer but photos of those will have to wait.