Sorry you are getting downvoted into oblivion. From the descriptions in this article it does sound like a solidly middle-class couple who are _choosing_ to live this lifestyle. Money is not tight if they are Lyft'ing to the grocery store etc. There are a lot of people who just assume if you are in a boat or RV you are destitute or mentally ill. If this describes you, check your assumptions. Maybe they are just not bought into the 'work yourself to death to buy/rent a house as big as you can afford and then fill it with junk you dont want or need'
I and my wife lived in our RV in silicon valley (thanks San Jose elks lodge) for a period of time. We chose a lifestyle where I would do consulting for six months a year in SV and then travel for 6 months. After several years of renting, furnishing, establishing utilities in a place only to unwind that all a few months later, we thought just getting an RV and staying in it was a better solution. So for several years we'd spend six months in the RV in San Jose, and then the other six months doing things like road tripping through Alaska, hanging out in Key West, sailing the Mexican riviera etc.
There's definitely some downsides to living in a small space, with a low level of stability - but in that phase of our life the trade-off to be able to travel for months at a time was well worth it.