What you mean? Saudis would never invest to Spain, because they can't make their money back?
well it seems its a combination of factors. they've done it in paris because it represents something and they have real wielding power over the league and even the country. bein sports and state of qatar are well established and have many connections in france.
why would saudis take over sevilla or valencia? things in spain are different. money from tv rights are scarce(compared to other leagues), fans don't have the same money as other countries and the two cities don't have the puling power of paris, rome etc.
the current rules prevent sheiks from taking over barca or real, otherwise they would have done it before all other clubs in europe.
sure, you may say that oil clubs just throw money away. but they have to abide some rules and get revenue otherwise it is too obvious and they get sanctioned.