Son got a log cabin, the buildit yourself type.
They are pine and need painting ect.
The paid 3.5 k for it and its lovely, however its not a one man job.
You need at least 2, and a couple of days, dry will be really helpful.
Their cabin is a 4x3. 5m iirc and has double doors and windows that are double glazed.
They painted it themselves though you can get them pre treated, which i would have if it was mine.
It has floor insulation and roof, this is a insulating board and not 100 mm foam and silver backed stufc you use in a house.
It requires hating in cold weather obviously but its lovely in warm weather.
Only thing I'd add being an ex paving professional is it really needs to be set up on the adjustable feet for PERFECT level cant stress that enough.
Your paving will be ok for the "sub base" but it will not be level and may have varying falls so your build wont work, these cabins Need the base frame setting up level.
Anyway enough of the doom and gloom and scare
, you'll be very happy in a cabin.
This is very similar to what they got..
https://www.gardenbuildingsdirect.co.uk/log-cabins/canton-apex-log-cabin