There are downloads to get it free on the internet but these are a pain to get to work (it doesn't recognize my mouse half the time) If anyone knows where I can buy this or a similar game or what I might have done wrong installing it other than the first time (it had to be uninstalled and hasn't worked since) I'd like to know.

https://www.abandonware-france.org/online/play/simtower/
https://www.abandonware-france.org/ltf_abandon/ltf_jeu.php?id=186&fic=liens

A game heavily inspired by: https://www.gog.com/game/project_highrise

Error 404

Looks like GOG is mangling the link and taking that final / off the end.

https://www.abandonware-france.org/online/play/simtower/

I edited the link, it should be ok now. The second link also allows to download the game.

Buy?
No.
But I can give you a hint: Something like this.