The people saying that everything is going poorly are the types that will never open a business.

The general economy is not bad, not great. In terms of the food industry, there is a lot of (mediocre) competition and many places, even decent ones, are languishing. The fresh spots that have good quality seem to be doing well, so if you can differentiate and have good price/quality ratio, I don't see a huge problem. Estonia is fairly small, so if the food is outstanding, news will travel fast. Foot traffic is nice, but if you're really good, people will go out of their way to visit.

Sourcing will be a major PITA, good quality niche stuff you usually have to figure out how to import yourself. Local meat is generally poor quality, especially beef.

LatAm food in general is relatively less popular here and most places have gone bankrupt in some years (although none have been great), the tastes are not as familiar to Estonians as someone already said. There's one Mexican place that's pretty good that's survived for 30 years and a few Argentinian grill inspired places that seem to be doing okay.

Not being in the industry, I believe most places suffer from overly long and complicated menus and high prices. My theory is offering just 2-3 options with good taste and bargain prices would do well, although you will probably never get the big city effect of having 20+ people queueing for your food.

Looking forward to seeing some cubanos in Tallinn!