1) The gamemode is so broken, script wise. I found myself constantly needing to fix/change things in the gamemode itself.
2) Too many ways to exploit/glitch things.
3) All people do is bitch when they lose their money and ask the admin to grant them some. Like no.
4) I originally intended for this server to be more build oriented, as opposed to a Cops vs. Robbers DM. This goal is completely too far fetched for this game mode.
5) You can have whatever dream team of admins you want, but people will still bitch and moan about the rules.
6) It's like a second job tending to it. It's not fun having everyone bitch to you about the broken scripts and such.
I can go on. I will never host this gamemode again. I'll stick to just playing other peoples CityRPG's. I'm going to begin development of a DM. I'd like to have a server in which I don't feel like I need to babysit.
Edit: On the good end, with BlockNet dedicated hosting, I was able to run my server with 45+ players with minimal lag.