There might be a much better way.

We would like to know how you spend most of your time when you're not working.
仕事のない時には、大抵どのようにお過ごしなのかお聞かせ願えませんか。

If I were you, I would go out with a few friends and spend a whole lot of money.
もし私があなただったら、数人の友人と出掛けてお金をすべて使うでしょう。

"There might be a much better way." 
"There would be no end if we start spending too much time on it."
「もっといいやり方があるかもしれない」
「時間をかけ始めたら切りがないよ」

I should appreciate it immensely if you would be so kind as to find a serene country inn for Mr. and Mrs. Sullivan to spend their weekend.
サリバン夫妻のために週末を過ごせる静かな田舎の宿を探していただければ大変ありがたく存じます。

I had to spend a week finding somebody who would take me to my destination.
1週間かけて目的地まで連れていってくれる人を探さなければなりませんでした。