If people are paying someone to “install” their printer, why would it be different with Linux.
With printers spesifically I'd bet people don't need to pay for support with Linux as much. Sure, there are models which just won't work, but in general my experience is that printers are mostly plug'n'play with Linux.
A few months ago I did a helpdesk gig on one local small business. They consume a lot of paper due to requirements on their business and they have some fancy KonicaMinolta photocopier. They guys who installed the printer had struggled for hours to get that thing to work on their Win10 machines. I did what was requested and they asked if I could print out notes I wrote for them for reference but immediately started to wonder if that's feasible as the printer was so difficult to install. It took less than a minute for my mint-laptop to locate the printer and start using it. No idea if the printer company techs were just incompetent or if the software for it is bad, but apparently I'm now some kind of tech-deity in their office...
It's quite likely that any given IP, unless you get one from shady VPS provider or something, is "clean". And if it's not it's usually not that big of a deal to get it cleared from major blacklists (spamhaus, google and microsoft covers quite a lot). You just need to dig up proper forms to tell them that you're a new owner of said IP and promise to play nice.
Same goes with domain names, but if you get a new one that's a non-issue. Just set up SPF-records properly (and preferably DKIM/DMARC, but those aren't strictly necessary and need a bit more than a single TXT-record) and you're good to go.
And then you of course need to stay away from those lists. If you configure your SMTP to act as a open proxy you'll be on every shitlist on the planet pretty quickly. So, reasonable measures against compromised account (passwords, firewalls, rate limits...) and against other threats (misconfigured/unsafe web service used for spam and stuff like that). Any of those alone are not too difficult to accomplish, but there's quite a few things you need to get right.