Implementation of business ideas

Hi. A little about myself: I'm 42 years old, retired.It so happened in my life that at the age of 39 my wife left me, let's say, she met another person. At the same time, she left three minor children with me (because they prevented her from arranging her life) and went to another city. During cohabitation, in the aggregate, I receive pension+salary (pension is about 2 a living wage in my region) + her wages in full enough, so to speak, to life. Left alone with the children, over time, I had to quit my job(traveling, irregular schedule, but a good salary), so to speak, (school, children lagging behind the curriculum, lack of control and some bodies(to my surprise, which employ people who (have no children, very young), but teach you life)). After dismissal, the pension was added to the Supplement for the maintenance of n/a children, which is comparable to the minimum s/n in the region. Of course, this money is enough, so to speak, end to end. Have somewhere to save. I, increasingly began to wonder where to make money, not to the detriment of themselves and children. In 2010, while in St. Petersburg, I saw a group of foreign tourists buying a souvenir "Air of St. Petersburg in the Bank". I thought, this is someone TechEd in the head, now not only we Russians buy them air of their cities, but they are ours. It's real, money out of thin air. Remembering, I thought, and what else can be sold, what is next and will be in demand. A lot of ideas came to mind, but googling, I realized that this niche is already occupied. And somehow, I wondered what motivation people buy "Air of St. Petersburg in the Bank." This "MEMORY". And then, I understood the motivation, here's what to look for. I chose motivation, in my opinion that push a person to buy the product "MEMORY" "PRIDE," "PATRIOTISM" "HOPE." Here the question arose: what to tie, these motivations. But all the thoughts came across the same thing. "Niche, already taken." And in the month of February, I watched a TV show and then I realized, here it is, what you need. And need, motivation links, not to something, and to someone. I began to Google and found to whom and to what, these motivations can be tied. And this, what is next to us, this is something that should not be produced(take, at least, buy for a ruble), but you need to pack(sell for 50 rubles). Is that for us daily, and for a foreigner is associated with both "MEMORY" "PRIDE," "PATRIOTISM" "HOPE." This is a gift, a souvenir that will be in demand. There is a similar product in Google, but there is no reference to tourism, Souvenirs and gifts, a specific category of people and their motivation (hidden in the title). This product will be sold on the Internet sites "Amazon" "Alibaba", and in the future on tourist routes(requires more investment). Why you need to register as an individual entrepreneur, product certification, patent, etc.. To tell, I can't because the business idea, and idea stealing. Thank you in advance for your help.