I too love bats, and do know their attributes. We installed a bat house in our yard to try and attract them. Not to say I want them in my attic or near my house. Yard ok for insect control.
I enjoyed reading Stellaluna to my kids, and a little stuffed bat came with the book. They are quite misunderstood, but are associated with rabies, Ebola Zaire, and of course Covid, maybe?, among other things. I’m sure the guano is very rich and good as a fertilizer, but maybe best to treat it as a biohazard. The Hunta virus can be inhaled from rodent droppings, might not be a stretch to think bat guano may carry something also.
As far as attracting them to a bat house - possibly planting aromatic herbs, flowers, and night blooming plans could lure them there.