I used to like doing that because I could focus on the task at hand to the exclusion of everything else- sort of a decompression. Besides, when I was done, I had a neat model that I could operate on my still-to-be-built layout.
I have some still to be built things too! Lol I built a miniature orchid village. 2’x14’ for an orchid society to be used to display at shows. Each year I added a 2’ square section. It had a greenhouse with hundreds of miniature orchids and all needed accessories. It was electrified and landscaped. From there I added a laboratory, a store, a potting shed. a gazebo, a jungle trail and a waterfall with running water and birds, animals, insects, reptiles etc. I finally stopped building because it took two vans to transport it. Lol I imagine your layout would be similar to build. I built 1”=1’
I did build more greenhouses to be sold to benefit orchid charities. I got the same pleasure that you describe. Hobbies can be very relaxing.