I know that I can use the below to eager load relationships, but how do I add "shortcuts" in the model - so that I do not have to keep digging to get the data. i.e. instead of writing (and digging down each time)

->with('location.company')

I would rather write

->with('location')->with('company')

(Example model that returns the data for location and null for company)

/**
 * Returns the location that the equipment belongs to.
 *
 * @var array
 */
public function location()
{
    return $this->belongsTo('App\Location');
}

/**
 * Returns the company that the equipment belongs to.
 *
 * @var array
 */
public function company()
{
    return $this->location->company();
}