Really you can do whatever you want. We're just the internet.
The thing I've learned about fish, mainly from my betta and gourami, is that things will be fine for a few days while the new fish settles in, things turn bad. Its like when fish don't eat at first, but once they're comfortable they do. Fish won't fight at first (maybe), but once they're comfortable they will.
Things might look okay for a few days, but you could possibly wake up with a tank of dead fish. Do you really want to take the chance of wasting the money and the lives doing this?
If you like cichlids, and I think you do, why not save up and get a huge cichlid tank eventually?