
If you have a room like your kitchen where the pup can be safely left (no wires to chew etc) then I would use the kitchen as her play area and leave th crate Open during the day.
You could attach a good sized Puppy pen (they come as Panels that fit together) but for a bigger pup they have too much give, unelss they can be fixed to the walls to make them more rigid, or Croft do a heavy duty box section puppy pen that is rigid, but pricey.
I would not think it right to crate any dog for a whole working day, with just a lunch break.
The pup would need plenty of toys to play with, and a TV or Radio left on for a bit of company.