「不動産の役立ち情報」がない場合は（ないほうが多いような気もしますが）、英語かドイツ語で何か書きます。

I spend 3 hours for cleaning.
I am satisfied with the cleaning itself,but I have a doubt that an owner of a company spend such a lot of time for cleaning.
If I don't know Mr. Kagiyama Hidesaburo, I can not continue the cleaning.