"Do you have plenty of money?"
Translation:An bhfuil go leor airgid agat?
Airgid is the genitive form of airgead. Among its uses are:
- possession (e.g. mo chuid airgid, “my money” [literally “my share of money”]);
- a kind or description (e.g. deacrachtaí airgid, “money problems”; grá airgid, “a love of money”);
- the contents of something (e.g. próca airgid, “a jar(ful) of money”);
- when a preposition takes a genitive noun (e.g. Oibríonn sé ar son airgid, “He works for money’s sake”);
- an object of a verbal noun that follows the verbal noun (e.g. Bhí an gnólacht ag cailleadh airgid, “The firm was losing money”).
Other genitive uses are possible, but they could be rather contrived with “money” as the noun in question.
In the sense of plenty meaning "a situation in which items are available in sufficiently large quantities", a lán would be more than acceptable.
In reality, the sentence should read either "Do you have enough money" or "Do you have a lot of money" - "Do you have plenty of money" isn't a statement that fits comfortably into either language.
go léir and go leor are two completely different phrases.
If the noun comes after the phrase go leor, it is in the genitive - go leor airgid. If it goes before go leor, it is in the nominative - airgead go leor. They don't mean quite the same thing, but you could make a case for either construction in this exercise.