Okay then an old laptop with a smartphone tethered. Or buy IPs from a vendor. playwright X or Medium, profit
Discussion
Or start a business leasing computers. Have considered this. The marketing looks hard.
How does that work?
Buy bulk lot of ex-lease business laptops running Windows for cheap.
They're mostly flagship products, well built, but three years old.
Install Linux. Maybe upgrade RAM. Install another admin account, openssh-server, and Tor running a Hidden Service on port 22.
Advertise with a promise of cloud monitoring, and tech support on demand.
Ironically, this will need to be heavily marketed. And I don't know how you'd market this through legal channels
I have done so in a small way on FB and Gumtree.
I haven't made use of my fully legal and disclosed backdoor for anything, though.
But at scale, I could.
Just not sure its worthwhile. Cheap disposable junk laptops from China are so cheap, and consumers so unwary...