Very cool! Glad to see others encouraging the Bees to make homes in yards. Looks like they have alot of options at your home which is great, and that little awning will protect the homes from the rain. The mud can get washed away without a little cover.
Yep I designed my boards to be serviceable, so I can deal with mites or other critters that try out crowd out the Bees.
I may just rebuild mine after a while. Our garden has lots of wild areas. I noticed a lot of bees around at the weekend, so we are doing something right. Some wasps tend to make a little nest in my shed, but I don't really want to encourage that. Those paper nests are so delicate.
Nice, if they are showing up and visiting the homes sounds like they will take to them.