Slats or sturdy weldmesh floor works well as far as economising on bedding goes, but is not so good if you want to use the underneath of the coop as part of the run. It's best to collect and remove the droppings somehow. I'm going back to solid plywood floor with corrugated cardboard underneath the bedding. It's dead easy to clean out then, and I'm pretty sure it helped keep redmite at bay. You do need a good source of cardboard though, as you need to replace it at least once a monthish or you would be helping the redmite, not getting rid of them.
Originally I had intended lining the floor with lino, so as to be easy to clean, but somehow never did. 

I think it's yet another of those things where everyone has their own way of doing it. 

A new house you lucky thing. My vote goes with the lino, I've lined all the houses with lino and once a month take it out and scrub it and  powder underneath. It makes your floor look like new for years and easy to scrape any muck up. Try your local freecycle to see if anyone it getting rid or any. perches above a droppings board is also a big time saver especially in winter.

My vote goes for solid plywood and straw; which I clear out every 3/4 days. Yearly creosote.

Slats get mucky, droppings boards you have to lift out and clean so eventually I went for the easiest option for me. But like earlier posters said, it's what suits you.

I also put lino on the dropping board below the perches scrap it off daily then  just take outside every few days and scrub, dries quickly. the lino on the floor goes up the wall a couple of inches so the shavings doesn't get under it. but in the small houses it is less of a problem so the lino is cut to size.

This is his progress so far.  Pop hole not in yet.