Well.....your estimate for the cheapest EFI system is still over twice the price of the carb set-up. And will probably pass triple the price for many users. And that is still the cheapest set-up with an external pump, no costs for sumping the tank, assuming the installer can handle all the connections, etc. And that cheapest kit is not necessarily the preferred set-up.

What about ignition control? Seems important to get the most from an EFI system. Any extra costs or labor to that?

You seem to have more carb problems than the rest of the posters here. Personally, I do not experience the issues you list with my carbs.

If you want to believe that the cheapest EFI system that is 2 or 3 times the cost of the preferred carb is the way to go.....then go for it. But at least be honest about the comparison and compare apples to apples.