This is something I've been thinking about since my HOA sent me an email a month ago warning me that the sidewalk outside my property may be damaged and in need of repair because if someone tripped I'd be liable for this. Of course the email had a bunch of red and gold text.
Luckily for me they already had a concrete cutting company come by and survey the area and provide estimates for each plot.
My bill would be about $200 to fix the sidewalk. I looked outside and it was totally level and no edges exposed.
In really small print at the bottom of the email was information telling me it was optional to do, but again I might be liable if anything happens.
Today I saw this person outside doing the concrete repairs. It was a guy with a small trailer and grinding down the sidewalk with an angle grinder and a vacuum to suck up the dust.
This basic concrete cutting job is pulling money in if he can go around and tell all the HOAs about the urgent need to fix sidewalks and HOAs pass that along to all the residents.
How many people paid the $200 "to be on the safe side"?
Now you repeat for all the other services you can think about for home maintenance and repair and contact HOAs with estimates they can pass along.