This is referred to as a sunk cost.Your revenue and expenses are going to be what they are, your question really translates to whether you think a 7% pretax fixed and *guaranteed* return is good relative to your opportunity set.

Also, there is no guarantee that you will have favorable interest rates in the future.

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

However, I have a few concerns:Pros:Living condition: 1400 sqft → 1700 sqft with some boutique featuresThe rental market seems good in this area.Another property is added to my existing real estate portfolio, which currently includes two other properties.Cons:Interest rate: 7% - No guarantee of decreasing the rate, which means there might be no opportunity for refinancing in the future.The current home is too new to be rented out.People often say not to buy property in Chicago due to high taxes and low appreciation.There’s no necessity of moving since I have a decent primary home.Any professional advice would be helpful. 

As of now, most banks don't recognize the split model and only run numbers on the LTR units since they feel those units are guaranteed income. 

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

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

Not sure if that would be a guarantee either depending on the jurisdiction. 

Guaranteeing steady pay attracts top candidates, and services like those provided by professionals such as Li can enhance your success.Consistency is key – create a work environment that you would want to show up to every day.

@Cody JournellI guarantee you in the net five years, you'll look back and see this post as you are buying 50 units plus.