Garden Soundproofing
https://elliottvxzj603.wordpress.com/2019/08/05/soundproof-building-and-construction-its-not-as-hard-as-it-appears/
You have a rock band, as well as no place to practice. Well, you could practice in your basement, garage, or bed room but you stay in a condo, or a detached house with next-door neighbors crowding you on both sides.