If I recall correctly, that's literally how he even managed to get the job in the first place. I don't quite remember which exact chapter it was, but in one of the earlier ones, we find out that the reason Mincheol wasn't fired until now (since he is known to be quite a slacker during his work hours), was because of the word from the higher-ups.
His coworkers were told or are highly speculating (I am not exactly sure of the small details anymore( ̄∇ ̄")) that Mincheol was related to Taeha's family. That's how we know that this WHOLE situation was orchestrated by Taeha himself. We just don't how exactly it came to be and how he planned for it to unfold itself further, so that's one of the things that I am anticapating the most.
Also this is just my speculation, which was already voiced by other people and then pushed aside again, but I am still under the impression that Ari is somehow connected to Taeha as well, since he told Jay to try to see through it, that Haesoo and Mincheol meet again and then the immediate cut to the scene where Ari talks about seeing Haesoo again... But it could be just me reading too much into it, since Taeha already sent Haesoo to search for apartments in the same neighbourhood where Ari and Mincheol live...
I am so sorry for such a long reply, hopefully it wasn't too tiring to read...( ̄∇ ̄") It's just that I wanted to word it as best as I could, so that it's properly explained and got exited to talk about my speculations in the process... ⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄
honestly I never realized the theory about Taeha and Ari knowing each other. It’s odd that she works for Taeha’s families company and earns so little especially since her father is rich ( I’m referring back to the scene where she said she’d just crash her car and her dad would just buy her a new one. )
But I don’t think they know each other, and if the author does make it to where they did know each other the whole time I’m gonna be a bit upset at least for haesoo’s sake

Haesoo told Taeha not to worry about finding them a place and to leave everything to her. But knowing Taeha he’s definitely gonna pitch in and buy them a place to live probably close to where Mincheol and Ari live.
Also that last scene with Haesoo passing by that building and Ari complaining about mincheol leaving frequently- I’m hoping we get an interaction between the two girls. I think she either passed by Her ex-husbands job or Taeha’s job in that last scene.
Either way I’m so excited for the drama and the post time-skip since we all know this is written in past tense.