Since you don’t have a big area to clear, you probably don’t need a large machine. You could use a small two-stroke or battery-powered blower, and be able to handle a moderate amount of debris. You’ll need an airspeed of at least 175 mph if you’re going to move anything more than leaves. If you have a lot of debris and sticks, you’ll want to look for a model with over 200 mph and a high cfm.