Interest income is interest income, unless you decided to roll some of the current cash into a self directed IRA at which point your interest income would be deferred for a later time and allow your funds to grow tax free.

What's left after subtracting the expenses is your Net Income. 

Quote from @Diyan Yap: Have you thought about AirBnB, they can visit/stay with you while they rent it and earn income. 

Hi All,
I own investment properties in Virginia Beach and Hampton Virginia.  Two years ago I started a maid company in Hampton Road Virginia.  While I have grown my client base to a respectable number, I've struggled...

Both generate passive income streams without you having to clock in at a 9-to-5.🏗️ Building Equity While Others PayWhen your tenant pays rent, they're helping you pay down your mortgage - building your equity.

You are going to have to earn that somehow.

If you tie the bonus to early renewals, a bad employee will renew bad tenants just to earn a quick buck.

But in my experience, you would be better off spending that same amount of time/hustle working a second part-time job with guaranteed income, then investing in buy-and-hold properties. 

If you spend time learning how to manage well, your income will increase, you'll save time, and you'll maintain your sanity with the courage to expand.

You'd learn and potentially earn a profit at exit.Another way is to wholesale the land.