Hi Armando,
With a drip system at work - yes ok - else forget about that - with that little quantity of dirt, here, on a sunny day everything is toast before you can help.
A neighbor did that test with flowering strawberries - Man that looked cool ! - and well - everything got toasted in a week - just the time for the initial moisture to leave the dirt, and then the dirt became hydrophobic .
If one lives with toxic dirt, I can see that being a solution - but here my dirt is good - so let's use that one !
As for tomatoes growing, some here cover them with a plastic roof - the reason being that "the rain is carries pollution and is too acidic" and that gets the tomatoes sick - Mainly black stains disease.
As for now, I'm using strong cultivars - Roma - and I don't have to go through those setups.
If you want to test something cool, try "Morelles de balbis" - they are always blooming and make an edible fruit - I have one this year, and it is really beautiful -with big flowers comparing to the ones of the potatoes - and still edible.
You can use that against a fence - no one will try to go through - they are heavy thorny -stems and leaves.