"economical" has no comparative or superlative form. You would say "more economical" or "most economical."

They have a fair economical condition, or they have a hard economical condition.

It's missing an adjective for the noun 'economical.'

When "economical" is used as a preposition it is correct to say : They have an economical condition, with the meaning of profitable.

The nouns related to the adjective 'economical' are economics and economy.

Benjamin Franklin was the author of 'An Economical Project.'

I wish you weren't so economical with the truth.