turns out to be a very profitable business.
I want to start an additional business.
Here is infa from books on animal husbandry:

Cockroaches are one of the most common food objects for terrarium animals. Their advantages include extreme unpretentiousness in maintenance, speed of reproduction, lack of smell, aggressiveness. There is essentially only one drawback - the ability to crawl on glass.
Cockroaches are a universal food for almost all lizards and amphibians, some turtles and snakes. But their mobility and ability to hide should be taken into account, therefore it is advisable to feed cockroaches by placing them in special feeders, partially removing the limbs, or offering the animal with tweezers.

Here's what the breeders say:

Today, the cockroach is one of the most popular fodder crops, due to several qualities of this species, such as: low cost, unpretentiousness and high fecundity. In my case, for example, in 2 years a colony of 40 cockroaches has turned into an army of thousands of destroyers of everything edible, and continues to grow.

Option 2

Business idea: Breeding Madagascar cockroaches for work on holidays.

Who it's for: Everyone.

Required resources: box or aquarium, cockroach farm.

Required personal qualities Keywords: love for insects, responsibility, organizational skills, sense of humor.

Initial capital: about 500 rubles.

Recently, it has become popular to keep exotic animals and insects at home. You can earn money by breeding some of them. This also applies to exotic cockroaches.

For comfortable living and breeding, rams need to maintain a temperature of about 25 C and air humidity (it is enough to spray the aquarium with water once every two days from a spray bottle).

For reproduction, it is enough to have two individuals (male and female). The cost of a pair of cockroaches usually does not exceed 300-500 rubles, cubs can be bought for 50 rubles. Cockroaches grow very quickly and, under comfortable conditions, begin to multiply. As a rule, offspring (10-20 cockroaches) appear within a couple of months after buying a pair of “newlyweds”.

The resulting offspring can be sold (to a pet store or through an ad), or you can do more profitable and arrange cockroach races as entertainment. Yes and original gift friends will always be at hand.

How to organize cockroach races?

For competitions, you need to have several (10 -15 individuals) trained "athletes" and a cockroach track. The cockroach track looks like a large box with low sides made of transparent plastic or glass, the field is divided into treadmills, the start and finish lines are marked. You can make it yourself, or you can order or buy in a store.

Cockroaches participating in the race must be prepared in a special way and be on a special diet (usually cockroaches are not fed enough for 3-4 days before the competition).

How to implement a business idea?

You can offer your services on various corporate holidays, friendly parties, on New Year, birthdays and even weddings. If there are familiar organizers and hosts of events, you can agree on cooperation with them and try your hand, you can also advertise in the media that a new entertainment service has appeared in your city.

Each participant chooses a cockroach and cheers for it. You can come up with a funny nickname for a cockroach and encourage your athlete in every possible way. The leader must develop a program for the races, announce the start of the competition, announce the results of the races and award the winners. Having good organizational skills and a sense of humor, you can turn the competition into an unforgettable holiday for its participants.

However, it is worth remembering that it is impossible to make money bets on such races, sweepstakes in our country is prohibited by law. But to make a prize for the winner of the race is not forbidden.