I know it’s more than I can afford!!! In looking around, I found one that was the largest of the size that I could fit in my house & it costs $5,000. Of course, that’s just the beginning of the expense. The medium used to guild the house will be extremely expensive. As a matter of fact, it’s so expensive that you have to call for a quote!!!
IF you’re looking to build a guest house, you might want to check into the Tiny Homes that are the going craze right now. They can bring it up on the back of a truck & sit it right where you want it. All you need do is get it hooked up to the power & water. Not a lot of space but it will encourage guests to not hang around for long!!!