I agree with everything Rose said on page one.
We are in a holiday house, rural seaside location at the moment. It sleeps 8 in 4 bedrooms. It's an old, spacious house and marketed as 'luxury' but is not a rip off (650 for this week). It's my fourth time at this house and what is so great is the owner offered us a 10% discount for repeat bookings which encouraged us to come back.
We love it, we look after it because we respect our host. Make sure everything is clean - spotless cutlery, plates, pots etc. Supply a range of cleaning products, hoover, mop, cloths etc and most people will use them.
I think it's worth investing in some decent furniture and supplement it with 'cheaper' linens. I don't expect egyptian cotton but if you supplied it, I'd look after it. Linen and bedding washed with fabric softener is enough for me.
The beds in this house are single zip togethers and are really comfortable. Invest in decent beds, there's nothing worse than going for a holiday and having a poor nights sleep (that's important to me, esp with kids).
Paint the walls white with wipe clean paint. Sorry, but your furniture looks too flimsy and really uncomfortable. When the kids go to bed the adults will want a comfy place to sit. Buy some brown leather armchairs and sofas which you can wipe clean.
In this house, there is a racked, boot cupboard in the porch which encourages people to house their shoes when they step foot in the place. The porch, kitchen, bathroom and downstairs hall are all tiled which is easier to keep clean. Bin the laminate idea - it will trash easily, either invest in some decent wood flooring, tile it or get hard wearing jute.
Good luck. I saw what you were aspiring for - brilliant. Your garden is amazing, some professional photos and the bookings will roll in, I'm sure.