Spending the night at client's houses?

I just declined sleeping at someone's home because once I got there I was wildly uncomfortable-something just felt off. I told them that I didn't feel comfortable and the dog wasn't showing signs of anxiety so I decided to sleep at my own home.

However, I do not have my own car so the sits I have done I've always slept there. However the one I just mentioned I didn't do a meet and a greet so I felt like I wasn't supposed to be there? Anyone else I've met and been in their home for several hours before I commit to it. I prefer to sleep at the homes of either women who live in a secure location (not first floor, etc) or a couple. I personally wouldn't sleep at a single man's home or a woman's house in the middle of no where.

Most people that reach out to me for traveling pet services are shocked when I offer to sleep the night, most people don't expect it or they feel just as uncomfortable!

I always stay the night when I sit. However, no one is home, it's just me and the dog(s)/cat(s). I tell them beforehand that I do pet-sitting/house-sitting so they know what to expect. We go over everything during the meet and greet. If something doesn't feel right to either of us, we don't book the stay and they go with another sitter.

I use public transit and don't have a car, so it's not easy for me to travel back and forth between my house and their house. That's why I am a travelling pet sitter.