Most constructors prefer mobile cranes rather than tower cranes for normal load lifting as they can be used for both civil and industrial uses. Moreover, they can be carried easily, no setup or dissembly time, they are easily maneavurable and are cost-effective and time saving… Especially for small projects, it makes much more sense as far as cost effectiveness.
However the larger the project or the task gets, the longer that project or activity continues, the more sense it makes to use a regular crane.