Is this adequate?
There is no way we can answer that question. "Adequate" depends on what you are trying to
accomplish, and is totally subjective with out clear criteria by which to judge it.
There will still be stations you can hear who can't reach you, and local stations at some distance
that you can't work because they are too far away or shielded by terrain. But that will always be
the case regardless of what antenna you put up.
So you put up an antenna that you feel is a reasonable compromise between cost and performance
(based on the materials you have available, your budget, etc.) and use it.