What is wrong with those insanely cheap (5-15k) apartments/row houses?

So I want to move somewhere to work (I'm a game developer so I don't need a local job) and do nothing else. I would prefer to own the pace I live rather than renting so I don't lose value to a landlord. So I somehow found these row houses and apartments (I prefer the row houses) that cost like 5-15 thousand euros and they look fine, sauna, tiny garden, what else does a man need. It feels too good to be true so I thought I would check before planning for how I would move there.

So please let me know are these crack dens in disguise or perfectly fine housing for someone who works purely online and doesn't need to do anything else. I know about the monthly cost that it says on the page but that's pretty comparable to what it would be in Germany (my second choice of country) from what I've seen. Here's some links to houses like the ones I found, they seem to mostly be around the south east of the country.

https://www.etuovi.com/kohde/60731183
https://www.etuovi.com/kohde/572033
https://www.etuovi.com/kohde/v38834

Here's a couple of random ones I've found but there seem to be a ton on this website. I'm Dutch so I think immigration shouldn't be an issue from what I've seen. I know I'm weird for wanting to just focus on work but I'm trying to build something at the moment and wouldn't mind the lack of social opportunities much.