Hi jag,
What size tank do you have? Filtration? Experience?
One thing to keep in mind...if there was a Cichlid that was easy to breed and yet make money from the fry, everyone would be doing it. Then no one would be buying that particular species/breed/hybrid. It will be tough to actually make any money without a pretty big effort on your part.
Having said all that, Labs breed pretty readily and you might get $1 to $2 a piece once they grow out.
If you're in it for a few bucks, you may want to look at breeding Plecos. Again, you won't make a lot of money without a lot of effort (and tanks lol)...but the Plecos seem to go for a few dollars more over all.
Good luck to you!