Kit homes are just that a KIT lol

you usually only get a shell so its a house to lock up, you then need to complete the inside as you woudl with any home you buy off a plan.

We are looking at one which is 60 grand for teh shell we then figure teh rest will be about 60-80 grand for internals.

You can do 90% of it if you do an owner builders course.
you will need a sparky for all electrical and a plumber for all plumbing especially where you connect to mains.

you will then need carpets or tiles, kitchen and bathrooms.
the one we looked at came with plaster for internal walls.

you can also look at relocatable homes depends where you are as to who you look at though.
we are in mackay and tropical homes do some good ones which they kit out and basically your house arrives on a truck.

With kits homes allow about 6-12 month for it to be done especially if your working as well and weather.

it is a good idea and does come in cheaper than building a home with say GJ Gardner, but its alot of hard yakka and time