Он решил провести лето у моря и ост

Он решил провести лето у моря и остановился в гостинице, хотя мог сэкономить деньги.

Результаты (английский) 1:

He decided to spend the summer at the sea and stayed at the hotel, although it could save money.

Результаты (английский) 2:

He decided to spend the summer by the sea, and stayed at a hotel, but could save you money.

Результаты (английский) 3:

He had decided to hold a summer by the sea and stopped in the hotel, although he could save you money.