Thanks everyone for the advice.

Well, we are doing two things to reduce crowding - reducing the number of
roses but also increasing the bed sizes! We chose roses from books rather
than nurseries so that we could get some warnings like "black spot magnet
don't bother!" or recommendations like "wouldn't be without it in my
garden"
rather than just a pretty picture of the rose and no mention of any
faults.
This of course means that now that I am searching for the roses on nursery
sites, not all of them are available. There are around 15 that I haven't
been able to find so we will just cull those.

The roses are going on a 10 acre site locally so there really isn't any
space restrictions besides what we are prepared to dig and maintain. My
father owns farming machinery (and this is on his property) and we are
planning on inviting another 6 or 7 family members/friends to help us - so
we are flexible enough to make the beds bigger if necessary. We did some
planning the other night and already decided to put in some curves, an
island feature rose and then another curved bed on the other side to
increase the space.

It seems almost like the planning and preparation is as much fun as
enjoying
the flowers. We have small minis, ground covers, shrubs, cutting roses,
striped roses, some named after family, climbers (the largest to climb
through trees), modern, OGR and English roses. You could say that we have
chosen around 20 to start with, its just that it is 20 each

Looking forward to lots of flowers ...

Kirra
Brisbane, Australia
zone 10

Sounds very promising.

Be prepared for a lot of variability in growth.

The English roses in particular tend
to explode into growth in US zone 10's.

--
Theo in Zone 5
Kansas City