Just a little food for thought, and trying to be realistic.
The size for notatus fry to sell to stores etc, is probably minimum 2"-3".
You will need maybe 3 or 4 grow out tanks to raise healthy young to sellable size, and it will take 4-5 months of lots of feedings and water changes to get them there.
In your city, how many people are there into large cichlids? Those that will realistically buy a portion of the spawn? Are you a member of a local fish club that gives you a "captive" ready group to sell to?
I lived in a city of 1 million people, belong to a local club and usually found I was lucky if I found 2 or 3 aquarists who wanted what I had, at the exact moment I had them, and LFSs would take them for pennies of the dollar, more likely I'd get "store credit". Many people I knew would prefer to trade fish, which was OK, because in 50 years of fish keeping, I almost always lost money. or at best barely broke even.
My guess is you will need to ship, soon after you saturate your local market, so if you are comfortable with shipping it may work. But consider, you will be competing with well known, well respected, well set up vendors like those "you" buy from.