Buying house with garage Vs getting a prefab garage

[Acuity30]

Basically I have to have a garage for my next house. Not for my car, but for my motorbike and my huge collection of tools and car cleaning stuff etc.

Houses with garages are at a much higher price than same size houses without a garage. So I'm considering whether to buy a house without one and just buy a prefab garage and place it at the side of the house.

Has anyone got any experience with pre fab garages? This one looks fairly well put together but what about adding shelves, running electric to it, planning permission etc, sounds like a bit of a faff

https://youtu.be/Uv8O5CXAwAw?si=_2pzTSf8S6N1bnVM