Hi @wolfcub !
Firstly, try to let the “lazy” comment fall down your back. Our culture is so work/productivity focused that anything that isn’t a 40+ hour/salary/benefits position is considered less-than. And that’s just not true or fair, but also there are SO MANY OF US who are living alternative lifestyles, who don’t want to work full time and who are getting creative with how we life and make ends meet.
I’ve been sitting for 4 years privately (first summer on TH, on my 1st sit now in South Shore, MA and love it!) - and I work as an assistant for a biz owner, basically fully remote, and minimally have to hit 25 hrs a week, which I do, but not much more.
Sitting DOES take up time! For me, move in-move out days are full days of packing, schlepping my stuff to my car, into and out of a house and either tidying/cleaning before I leave or arranging/settling in when I arrive, etc. While we get to live in cool spaces, there is still a lot of time required - to do interviews or meet & greets, travel if needed, etc. Not to mention, if you have dogs that need walking or playtime, etc. Over the years, I’ve also come to prefer cat sits because firstly I’m obsessed with cats, and secondly, dogs are very high maitenance! (I grew up with big dogs and love them, but they often require long or various walks, playtime, being let out various x, etc) - so I tend to choose cat sits or smaller dogs vs. larger more active dogs, so that I can have a peaceful work day.
Last year I sat for 6 months out of the year. This year, I’m probably doing more, like you with Airbnbs in btw. Also, I would say it’s easier or harder depending on your location & ability to travel. I’m in New Jersey and TH is still a kind of new thing on the East Coast and folks do not travel for months at a time as they do in Europe or Canada. So piecing together longer sits takes time and some magic 
For me, my work as an assistant is an hourly job, and I do make money from my private clients in NJ. TH is a new thing for me and obviously it’s not paid, but it helps me live a life without rent for now, which is helpful.
That is a lot! But whatever you do, just own your choices and let people say what they say. It’s your life and you’re figuring out what works best for you! And, by living an unconventional lifestyle, you may seem to be in the minority, but you are in good company!
Cheers!
~KellySue
NJ, USA