I lease a horse from a place right next to Bridle Trails State Park. It's pasture board, but they have stall /paddock boarding, too. Horses live out on pasture 24/7 with run ins. Hay is fed at feeders once a day, and the horses can graze all day, since there is so much acreage. The park has 30 miles of trails , 500 acres of heavily forested land. It is literally across the street. Board is between $500 to $600.
NO feeding of grain, no arena, no washrack, no blanketing. Just a great open lifestyle and no drama barn, and great trail riding nearby.
There are four other comercial facilities on the park; all with indoor arenas.
I do not know their prices, but they vary widely in terms of quality of turnout, if any.
This is urban horse keeping. The advantage is that you are near your horse, but the disadbantage is the price and in some cases, the turn out.
My friend keeps her hours out in Redmond, while she lives in W. Seattle. It's a half hour drive each way, in good traffic (which we rarely have) but, the hrose has all day turn out, a 3 sided shelter, feeding twice a day, and access to trails, and trailer parking. Really nice place, with a nice outdoor arena. I think it's $500.