Ken S. Tucker wrote:
Wife ordered a clothesline installed.
After inspection all's well except I/we figure we need a
'clotheline elevator' something like here,
http://www.canadiantire.ca/search/se...08474396672077

The idea is she hangs clothes at hip height off a
1 foot platform, then hoists them up ~ 3 - 4'.

I'm a DIYer, so I'm also happy to build the unit,
so I'm asking for suggestions and best product
recommendations.

Solve a different problem: Don't raise the line, raise the linee.

That is, mount the line at the appropriate height and provide a step-up for
the person hanging the clothes. (assuming the line is on a pulley so the
washer-woman doesn't have to move.