1.0 engine fitting and removal

Hi one and all, i trust you had a good new year, i dont get on here as much as i would like but being 50 somewhat i thought the net was used for fishing.
We are down on the south coast have a 1.0 hijet Columbus campervan, the wife loves it more than me (take that either way)
i have managed to blow my engine but have managed to find a replacement that has had the head all done and was running well till bad rust took it off the road, my question is... how difficult is it to remove and replace an engine on one of these? have done it on a beetle but this aint no beetle, any advice would be greatly received.
Mark