Thank you everyone, I went with this one, but with a slightly different, bigger version 6090-200 SFU, it uses ball-screw instead of lead screw on all axes, and it's bigger, but the price was not that different so I decided if I ever want to try building my own one or upgrade it - I'll need a bigger machine to machine it. It It also has an increased travel on Z axis (200mm). I also ordered a mechanical Z-Probe with it. They said I can later order all the upgrades they have for it separately, also they said it can be made with linear rails for some extra cost, but I ran out of money so I decided to go with SBR for now and convert it to linear later if I need to. Also they said they use double Y drives only for their bigger models, so I assume the single one is fine for now, I can upgrade it myself later if I feel the need, I'll have a machine to make all the necessary mounts for it))
I already ordered it and they're manufacturing it for me (they don't have any in stock, that's one of the ways how they're able to keep the price this low), it will take them about a week or so to manufacture it and then they'll send it with a postal company because their manufacturing is located in a different city 1000km from me. If anyone is interested to see how it goes please let me know, I can post an update here once I receive it.