What if the price of renting a shop is high? What should I do if I go out and see a store asking for 8000 a month, but it's only worth 3000?

Ask the rents of nearby shops, and then discuss with the owners. The price is similar to that of nearby shops. Location is also measured according to what you do to see if you can make money. Make a budget first and see how the store rents out its profits. If there is profit, high rent is not a problem.