I don't think that I would convert a fishing pole itself, but the concept is totally sound.
An
actual fishing pole is far more fragile than the ones that have been converted to WFP use.
As Jeff says, there are now two suppliers of these poles now, and they are now at stage two of development; the poles (such as the superlite 2 from Gardiners) are now very strong indeed, far more robust than a straightforward fishing pole.
In use, once you have adapted to dropping off sections there is next to no difference at all in setup times compared to a telescopic pole.
And of course development is underway now for lightweight telescopic carbon poles.
The original poles for WFP, either made from aluminium or glassfibre are horrendously heavy and bendy, they are god awful things to work with, the difference in use between them and the very rigid and lightweight carbon fibre poles has to be experienced to be believed.
And if you want to work at 30ft and above it really is the way to go.
......................but I wouldn't go the DIY route though
Ian