My husband and I stayed at Trish's tiny house and loved it! Trish was very accommodating and was always telling us to let her know if we needed ANYTHING AT ALL, which made it feel like we weren't bothering her when we had questions. We ended up having someone tag along on our trip for two nights of our 7-night stay, and Trish was kind enough to allow that to happen. Although we didn't ever meet her, Trish was the perfect Airbnb host to have as first-time Airbnb-ers and we loved staying in her space!
I would recommend that two people is most ideal for staying in the tiny house, mostly because my husband and I are so comfortable with each other already and it is sometimes awkward to share a space so small with someone you don't already live with!