We hired log home builders to put up the logs and install roof, doors and windows. Then we took it from there. We did all the wiring, plumbing and drywall ourselves. (Don't want to do that ever again!) We did all the finish work. My hubby wanted to put up the entire thing ourselves but we were both in our 50's at the time. I said 'no way am I going to be moving those logs around and climbing on that roof'! So we compromised.
The house is a basic rectangle, 28' by 52'. But it's on a full finished walk out basement. And the decks on both sides of the house make it look a lot bigger and fancier than it actually is. The square footage is 1456 on each level so we have over 2900 sq ft of living space. Which is bigger than we needed but the rooms are large and there is plenty of room for grandkids and guests.
We live in the country so we had to to use propane for the gas fireplace. The propane also runs the boiler which heats the water for the in floor heat. Propane tanks can be buried so that you don't see them. Our propane tank was painted a light brown and camouflaged by honeysuckle bushes so it isn't obtrusive looking.
The free standing gas fireplace really saved us once when we had a blizzard and were without electric for 2 1/2 days. We were able to make coffee by setting the camp coffee pot on top of it. And coffee is important!! We were also able to warm soup etc. And it kept the living room bearable even tho a blizzard was raging outside.
Trying to do it all from scratch wouldn't be reasonable for us either, but I do like the idea of doing the finish work (at least some of it). Since it's just the 2 of us (with my DS visiting on occasion), we're thinking of 2 bedrooms/2 baths and a loft. Our old house was only 1300 and plenty big enough so something around that size.
Love the idea of warm floors too! Getting out of bed during these WY winters wouldn't be so painful, lol.