Detached houses are great, typically, for investors with a long-term strategy and tenants in such houses will usually pay a bit more in rent.
Of course, up-front, these houses usually cost more than the other property styles, so despite a higher rent, your rental yield may be the same or lower, than with a cheaper property.
You will want to check the potential for capital growth, as well.
(Values can go down, as well as up.)
With detached houses, being more expensive, you really need to do your homework because in a falling market, the more you have invested, the more you stand to lose.