Newbie - need help please

Hello…
So I’m really new to this… Basically… We have an connection in our company from T-mobile… But we don’t want to pay for another ISP to get it to home (it isn’t against TOS)… So we had an antenna on the roof of company and it was sending us the internet on 2,4ghz… But it is like 10 years old and the internet is a lot faster now… It goes like 5mbps which is horrible… So what I need is some new setup… I would like 5ghz, speed about 100mbps (it goes like 40mbps in company, but we want to upgrade as soon as they’ll get a faster one here…), vertical and horizontal polarization and 802.11ac standard… Honestly… I don’t absolutely know what to pick and how to do it… Everything should fit to 200$ (AP, client, maybe an router to company as well, since it’s too old). Distance between these two buildings is about 200m (https://imgur.com/JiWULCV, I couldn’t upload it to here so…)… I really hope anyone helps me… Send me some products to replies please! Thanks!

Use two of these as bridge :
https://mikrotik.com/product/RBSXT5HacD2nr2