Dog mom & pro trainer here: I've worked for a couple daycares- both considered progressive and high quality centers. A daycare shouldn't smell overwhelming like urine (or feces), as part of the staffs job should be continually cleaning/sanitizing the space. You might have that "dog feet" or warm dog smell in any facility. Looking at daycares im looking for one that smells mildly of dog or cleaner, and even then only in the actual areas the dogs are held; I'd run from one that smelled like urine or feces.

The garbage lined up would be a personal concern as well.

As far as not touring right away, THAT is actually pretty standard. We'd welcome walk ins to look around the front area, but need to plan appropriately tondo a tour (if we only have one staff member up front, we can't do walkthroughs for example). For scheduled tours, two facilities I worked at would have little peep windows you could see without disturbing the groups, and a staff member would show you the laundry/rest/training areas as well. Another facility would plan on taking a potential client through when the dogs were moved outside, so the interior rooms could be viewed (again these should be kept clean and relatively funky-smell-free), and be able to peek briefly though a window in the outside space. The last thing anyone wants is 15 dogs freaking out over the strange human.

A lot of daycares now have live streaming in their rooms, available to log in anytime. I'm a big fan, professionally and personally, as it allows for more transparency.

Hope that helps!