Dark_art_: Looking at the picture is indeed single slot. Is a GT 1030 too week for the games you play?
As I said before, I already have a main gaming laptop (core i7 7700HQ with 16GB of RAM and a GeForce GTX 1060). The idea is to have the Optiplex with a slightly weaker GPU for city builders, RTS, etc.
From what you said (after the quoted post), I could get a new Tower and PSU and get an even better GPU and it would work. Which is nice, but I don't think I want to invest that much.
As Darvond said, our taxes suck and, quite frankly, our merchants are all scalpers. People love turning normal everyday things into highly expensive elitist stuff, simply selling it at extremely high prices. I don't really want to spend a lot right now.
Furthermore, from what I could gather online, the way the tower is built, a GTX 1650 simply won't fit in it. So I may end up getting a 1050 and seeing how it handles my games.
A friend from the company who also bought one of these machines, got a GT 1030, so I know it works alright, but I kind of want a bit more.