How to say “Could such a small farm really be productive enough to support both families?” in Japanese

In Japanese

こんな小(ちい)さな農場(のうじょう)でも、両方(りょうほう)の家族(かぞく)が食(た)べていけるほど生産性(せいさんせい)が高(たか)いのかな？

Konna chiisana nōjō demo, ryōhō no kazoku ga tabete ikeru hodo seisansei ga takai no kana?