does anyone know how much it costs and how long it takes (or how is it difficult or not) to implement TFS version control ?
Did someone experiment the publisher to do so ?
See section 9.2 in the QlikView Reference Manual about source control. Might give you an idea of what is required to make it work. We have several customers using it.
I would also reccomend 4-part series of posts about first hand experience with QlikView source control integration:
Qlikview and version control, part 1 - Sigma Blogg
Retrieving data ...