"from a private third party" where? A (non-foolish) socialist would advocate for rules against renting people, just like we're not allowed to buy people right now.
That would mean there would be no private third parties that are renting out factories of rented workers.
If what you're saying is "from a private third party outside the socialist space", then that's a problem for all kinds of socialist spaces. We can't control productive forces outside of the space we have domain over.
It sounds like the market socialists you've been talking to haven't been socialists if they're in favor of private property, that's strictly a capitalist position. They're probably just welfare capitalists.
An actual market socialist is against private entities owning the means of production, they're owned communally by some mechanism (be it some democratically run cooperative, the state, etc .) It wouldn't be a group of stakeholders that are a separate, private entity disconnected from the workers (though the state arguably is an entity like that, and that's where the line between state socialism and state capitalism gets blurry).
I'm a huge anti-capitalist/socialist, and often times I find it useful to use this mix-up of markets and capitalism in my favor.
When people say "but we need capitalism because the alternative to markets is so bad" I say plainly that I'm not advocating against markets, I'm advocating against classes. The vast majority of self-described capitalists aren't trying to defend massive corporations or employer exploitation, they're defending markets.
If all those pro market capitalists became market socialists, dismantling capitalism would be far easier, then we could have much more interesting discussions about the merits of markets and when to use them versus centralized planning, without a leech class exploiting wage slaves or scalping houses.
On this note it's crazy there are people who will spend over $100 on a Windows license, when all they do is use a web browser or simple productivity apps like spreadsheets or word.
I can get if you're using some adobe products, or some game that hasn't been updated to the Linux compatible EAC, but for the vast majority of people paying over $100 (or having that cost passed onto you from the manufacturer if Windows is preinstalled) is crazy.
For people unfamiliar with the vim ecosystem (I assume that's at least part of the down votes), it's actually much closer than you'd expect. If you're only familiar with vi/vim, nvim customizations are essentially on feature parity with vscode, with the added benefit of the vim-first bindings.
What you have to do is install a customized neovim environment. Lunarvim, astrovim, nvchad, etc. Most of them have single line installation options for Linux, and then it comes with a bunch of plugins that will pretty much match whatever you'd find with vscode extensions.