@Kris Kellermeyer starting a business is not guarantee to make extra income. 

The problem is that there's no guarantee the problem will be covered under the warranty. 

@Steve Chan 1031 Exchanges are also not a guarantee.

@James York guaranteeing a return on investments?

His guaranteed baseball earnings:2018- $2.975 million2019- $6 million 2020- $9.7 million

Guests have no guarantee that hosts take all the measures to ensure property cleaning of the accommodation. 

It's no guarantee but it's a good place to start.

You can also remind them that electing to wait until their lease is over places no guarantee on them receiving a full refund of their security deposit.

Make sure to take that into consideration when you’re interviewing with brokers, just because their brand is reputable doesn’t necessarily guarantee that their local franchise office is.Hope I helped and good luck in your real estate career!!!

My current day job is guaranteed stable up till Nov 2021, it's a coin toss after that :/