Unfortunately walking in our suburbs no longer is safe.

Perhaps it would feel safer if it was a larger group walking? Here in Sweden there are organised night-walker groups, where adults "patrol" the area for a few hours late on weekend nights, wearing yellow neon vests. Both to be present if anything happens and to prevent things from happening just by being around. But there's no reason a group of people couldn't meet up somewhere and go for a walk together at 9am or in the afternoon instead, is there? :) Though if I had a beautiful garden like yours, I don't think I'd need anywhere else to walk!