Wow, you are firing off questions faster then I can read them and they are all good, but pretty general.

Are you looking for steady, low-risk passive income now, or are you comfortable taking on more leverage to scale faster?

Quote from @Chris Seveney: Quote from @Devin James: In 2021, we saw buyers upgrading to larger homes, taking advantage of 3% interest rates to afford an extra 300+ square feet.Today, smaller homes are selling much faster as higher rates make additional square footage less affordable.While rates are historically average, I don’t see them dropping significantly.

You could also charge a damage deposit, though there are pros and cons to this.

You'll see some familiar names thrown around a lot: Stessa, Apartments.com, RentRedi, TenantCloud, Innago, RentManager, Avail, Rentec Direct, Doorloop, etc.I recommend you search for each app online and see what they offer, how much they charge, etc.

If you don't specify a charge in your listing, you can't collect it. 

The first few times, I didn't charge a late fee.

I charge a completive market rate while providing a really good service. 

Raleigh specifically has introduced “Fast-Track Plans” designed to streamline permitting to build ADUs faster and more cost-effectively.

Make it look super 'cute' and charge double!