I took out a loan for a guitar that cost 500,000 yen.
I borrowed some money for a guitar that cost 500,000 yen.
この場合、次のような言い方ができますよ。
ーI took out a loan for a guitar that cost 500,000 yen.
「50万のギターのためにローンを組んだ」
to take out a loan で「ローンを組む」
ーI borrowed some money for a guitar that cost 500,000 yen.
「50万のギターのために借金した」
to borrow some money で「借金する」
ご参考まで！
カナダ 
