moving a small building like this is probably best done with as little thought as possible. a few years back i sold my house and moved to another. i had a nice shed outside that i considered taking. i tried to do everything right, and this is how it went:
it was about 9x16 to the outermost points on the roof, and about 8 feet at the peak. i could have easily loaded it on my trailer. the drive was about 22 miles of country road. i checked with the department of transportation and they wanted a sketch of the tow vehicle and trailer with the load on it showing all dimensions possible. they also said i needed a police escort for the less than one mile out of town, because it was a city requirement. i can't remember if i needed a lead and/or follow vehicle once i cleared town, but i don't think i did?
knowing that it would require a building permit in the new location i went to the town office there and was told i needed a full plan drawn up - site plan showing all boundaries, roads, setbacks, other structures, septic system, etc. even though it was only a shed. i also needed a plan of the structure showing sizes and a building section identifying the sizes of the structural members.
lastly i was told i needed a tax waiver from the original location's city hall. this is to prove that i had paid my taxes on the structure and there was no lien on it, and it could be legally moved.
trying to arrange this all in the narrow time frame between office hours and my free time was near impossible, not to mention the fees and costs involved. it was going to be a few hundred dollars and a lot of work before i got finished. i ended up leaving it as a present to the new owners.