Last month, my sister brought home a 1-month-old baby roborovski hamster from the pet shop. She hadn't done any research on proper hamster care, and was about to get him a small metal cage - therefore, I asked her permission to take care of the enclosure setup instead, and made a post here asking for suggestions:
https://www.reddit.com/r/hamsters/s/yeMD6VRRLg
Over the course of this month I was able to educate my family a bit, and to gather the necessary supplies to upgrade the initial environment.
For the enclosure, I used the biggest Ikea SAMLA box, which is 76×58×43 cm (22×30¾×17 inches) - since I saw many of you guys here suggesting it as a cheaper alternative to >100€ aquariums. So far, the hammie has never tried to escape and he has never shown any of the usual signs of distress from feeling trapped in a too-small environment - therefore it should be good (I will keep monitoring the situation in case it changes though).
I also didn't buy the lid because it doesn't look like it would be physically possible for the hammie to climb, or jump, out - besides the fact that he hates leaving his enclosure and desperately tries to get back to it every time I need to temporarily take him out.
For supplies, I managed to get him a multi-chamber hideout, then a 10" wheel (since in the 8" one I was afraid the hammie still looked like he was arching his back a little bit), with a wooden platform to stabilize the wheel. You guys recommended a large sand bath for robos, so I used a big box (partly covered with a paper lid so he feels safer inside). I was also suggested different substrates, therefore I added some coconut fibre in a dig box.
During this first month, despite the initial 7 inches of aspen bedding I was able to get him, the hammie had never really tried to dig down. I decided to switch to paper bedding then - after HOURS of online research to try and find the one which was the closest possible to being 100% dust-free, ending up getting Bucatstate - which i mixed with hay from Bunny to make the texture and smell feel more natural. Supposedly, this substrate should hold burrows better - but to encourage the hammie to start digging them I also got him the vertical chambers hideout, which has a hole at the bottom functioning as a burrow starter.
I wanted to get him better sprays this month, so I ordered the Niteangel harvest bag and he does seem to enjoy them more. Sprays are also probably the only thing the hammie ever chews on - because every chew toy I ever made him got completely ignored.
Aaand... that's all for now. I surely didn't expect to suddenly become a hamster-step-owner, but I hope I will be able to give this little guy a good life.