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One of these would probably be a better option. Better quality, not very expensive and easy to build. They have shed and home kits.
https://www.ezlogstructures.com/products/
Or build a 2 car garage with a apartment above. That way you could have a place to live, storage for personal things and a place to keep or work on a car.
Then, if and when you build a house later on the lot, you can rent the apartment to offset the mortgage. Or just have some nice added income $$$.
However, as rmay635703 has already posted, some municipalities don’t allow it.
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