[Hammy992]

The problem with plastic houses is that they can build up humidity inside and 'sweat' which can make the bedding damp and musty smelling.
A shoebox without a base and a doorway cut into it works great. It's well ventilated, allows a nice deep layer of bedding for them to make nests in and is cheap too.
Once it starts to get smelly you can just replace it with another one.
Wooden houses without a base can work alright too, but they may chew on it and it would need to be sealed with a non toxic layer all over like Plasticote to stop pee from soaking in and ruining the wood.

As for the veg maybe try giving him just one piece of vegetable at a time until his tummy gets used to it.