I worked at Ikea for a while and saw a lot of interesting space solutions while I was there. More recently, I ran across this furnishing website that did a lot of specialty items (including custom work) for small apartments. Not all of it would work, but some of these seem like they could be amazingly useful for someone planning a tiny house. I especially like the sofa that converts into a bunkbed. The desk that folds down into a queen bed is nice too, but probably a bit too large for any practical tiny home. I haven't gotten quotes from them, but given the fact that they need to make quotes at all seems to imply it is expensive. Either way, I thought I would note the website for everyone in case someone did want to check them out or get inspired by some of their ideas.