Here is another thought. Instead of asing reddit. Ask people the most wil likely be your costumers. Or at least be very observant around them. People will tell you their wants.needs.and pain points in normal conversation.

Taking care of people’s wants needs and pain points = money in your pocket.

Pressure Washer? Leaf Blower ?

Richest man in Babylon. How to make friends and influence people The go giver