Nice building! Very similar to the one I put up for the fishing boat and other stuff, except I went with a gabled ceiling and had to build my own trusses because couldn't get any from Menards that were what I wanted. Then I ended up moving my ham radio shack from the house to the far corner in this first picture - built some stud walls for the shack and insulated it separate from the rest of the building. I heat the ham shack in the winter with the RS-50M Astron power supply, Ameritron amplifier and radio gear. Keeps it at about 68 degrees in there with the rest of the building cold with the equipment idling, and it will get up to 80+ degrees in there if I'm using the amplifier running a net.
The rest of the building is heated with waste heat from the generator room, which is adjacent to the building on the east side of it, with wood backup for when the generators aren't running in the winter.
And then as fate would have it, the boat and lawnmowers are sitting in the machine shed. And I got the Harleys, Silver Wing and scooters in there in working on 'em for the winter - putting new Screamin Eagle pipes on the Electra Glide. My FXR Super Glide and my wife's Sportster aren't being worked on, but they're sitting in there anyway. And we got the Silver Wing and scooters for sale but never sold 'em last fall, so they're in there too. So it's now a motorcycle garage LOL!