Reason being...the EPA...Environmental Protection Agency.
Chrome Plating business like you're anticipating requires use of large metal plating tanks and equipment...polishing machines...spraying department...large plating baths that use very toxic fumes from dangerously poisonous Cyanide...which requires special fume hoods, floating fume balls, filtration equipment, waste water neutralizing equipment...then disposing of it afterward...expensive...dangerous to the air we all breath...and trhe EPA will shut you down in a New York Minute...
IF you could even get the now-impossible Local, State and Safety Permits.
If you're serious enough...do it as a Hobby Part Time Business with small tanks under 100-gallon capacity...which is also very expensive to fill these days.
As someone not knowledgeable in Chrome Plating...your first goal is to 'learn the business'...and best way would be to get a job in a commercial Chrome Plating Plant...if you can get-in...but don't say you're planning to be a competitor and want to learn all they know.
Better off shooting yourself first
Sorry...but those are the cold hard facts...I wish you luck in whatever you venture...Take care.
Respectfully...