About 25 years ago my parents also has drug dealers move in next door, but these guys were smart as extremely polite, no parties or loud music and even for a rental property kept the yard immaculate.
They changed the house number to large letters and kept the front door light on at all times so customers could get the right house. Basically day and night cars would pull up, run inside and then gone within minutes.
They were probably in the house for 2 years without a problem so very lucky.