"Fuel" is free, inefficiency is less of a concern.

Keeping them clean is maintenance. All forms of generation have maintenance requirements.

What is the cost of extra panels to overcome transimission losses? How does that compare to buying fuel at a more local plant?

How much does keeping solar panels clean cost? How does that compare to keeping a gas turbine running?

Didn't prevent Dubai from installing GW upon GW utility scale PV plants years ago. So, since it was already done more than once, I guess we can consider it a solved problem.

You would be surpised how little power is lost over a long transmission distances.

The hitch is the people that can make such cables have a long back order list.