Yes, I made the railing using electrical conduit and used standard caps at the ends and strapping to hold it in place. Here are a few more photos showing how I used a conduit bender to bend the railings at the top of the stairs. As far as the rise/run...I didn't want the stairs to use any more floor space than necessary but also wanted to make certain my two kids (6, 8, 18) could easy climb them as they do their outside play gym. You come down the stairs backwards (like a ladder) and they work really well. Even my 80 year old father-in-law climbed them to see the kids bunks in the loft. To make it even more treehouse-like, I built the kids a crank up rope bucket so they can transport items up and down.
Truthfully, it is amazing how comfortably you can live in a small home if it is planned out correctly. You just can't have "stuff" cluttering up the place. For example, we have a small under counter refrigerator that works just fine for us. In our other house, we had a very large refrigerator that always seemed full but upon closer inspection it contained 30 bottles of half used salad dressing and left overs. We cook in both the toaster and Nuwave ovens along with an electric skillet and microwave. We do have a small freezer which comes in handy as well (you can see it in the dining area against the wall in the previous photos).
The cabin is very energy efficient as we used 2x6 exterior construction with blown cellulose insulation (see photo below). The windows are all Pella low-e, argon filled. We purchased the windows from the return rack at Lowes at a fraction of the regular price over about a one year period before we started building.
This is the third home I have built with my wife of 26 years...and we're still speaking to one another
Stair Railings
Another view of The Stairs
The Kid's Bunk Beds (the kids helped build these from cedar)
Photo showing Cellulose Insulation