"Casas en venta baratas" is Spanish for the phrase "houses for sale cheap." This phrase would commonly be seen on real estate ads for affordable homes or apartments. In English, the phrase would be switched around to "cheap houses for sale," but in Spanish the adjective often comes after the noun.
The Spanish language has more flexibility than the English language. Word placement in Spanish writing often signifies emphasis on words, whereas English writing does not change emphasis based on word placement.
English-speaking people who see the phrase "casas en venta baratas" can assume that they are reading an ad for affordable housing or cheap apartments.