If the object and location are otherwise eligible, the fact that it was installed by a Wayfarer user (including the one nominating it) isn’t, or shouldn’t be, a factor.
For instance, long before Wayfarer even existed, I built a large freestanding community notice board with roof, of the type often found at nature parks. It’s still there. I would have submitted it, except that I know its location is not eligible (it was built as a donation for a church owned elementary school).
Also, you do not need to wait for street view. I have submitted new objects / businesses (a little free library and a fitness gym) that were less than a week old; both were approved. And I have also submitted several objects that do not appear on street view due to location (murals and a portrait located on interior walls of buildings), which were also approved. I have also encountered many similar Wayspots (in enclosed shopping centers). While street view can often be used for confirmation, it’s not necessary and in some cases the results are not useful.
Yes; I was just using my bulletin board as an example of an object that could be placed by a Wayfarer user and yet be eligible (if in a permissible location, which mine is not). The principle holds for other eligible objects.
It is something that has been made just to create a wayspot and quite possibly it will be removed once the wayspot is accepted.
Something that is created which just happens to also be eligible as a wayspot (such as @CostcoShopper13 's Bulletin Board if it wasn’t on school grounds).