Bi-fold door blind options

[Labmum]

As part of some renovation works over the Summer we will be having 5m bi-folding doors installed and I'm wondering about blind options. I've been quoted £400 per panel for integral blinds within the glass of the bi-fold doors.
Does anyone have any other options that they would recommend (pictures would be ideal) and an idea of cost?

Curtains. Such glazing needs the drama of a 5m+ curtain

I spent hours online working out what to do with our 4m 5-fold bi-folds - and in the end the best solution was to get a rollerblind per door from ikea - these ones - its worked out really well actually as there are no cords and you just pull them down and then tug on it and it rolls itself up. We don't have much space either side of the bifolds for masses of curtain material and didn't want the glass obscured by pulled-back curtains either - this way, when the blinds are up they only cover up the wooden beam at the top and not the glass at all. Plus this was a really inexpensive option!

You could build a hidden cassette above the bifolds which could house a roller blind. That way when the blind is not in use it is up out of way & not obscuring the heat lines of the doors.