Hi Pete of course.
The document weighs in at 103 pages but you do need to print 2 pages twice so 105.
I've used the majority of an A2 size sheet of foamboard doing the ground floor and the beginnings of the 1st and will need another if Im to carry on.
the instructions need a few read throughs but it became clearer when I had the bits in front of me. I printed it out on standard printer paper and with only one or two major parts to a page and those well labelled doing the actual cutting and assembly of the parts went smoothly enough.
Putting all the walls into place got a bit tricky, as I found one or two of the walls did not meet up as expected, one in paticular is at least 8mm to long. which is why the build looks a bit wobbly in places, so test fitting all connections before applying glue is essential.
The only doors I cut out were the secret passage ones and for those there are rabbeting templates so it was easy enough.
Over all its a nice model and worth the investment if you have the time to build it.
HTH Soldado