My income is $70,000 annually from a W2 job and I have no outstanding debt.

if you only do negative cash flow for few hundred bucks and your large income is good enough and you plan to keep the house for ten years, then this is not an issue after all.

I’ve been doing this type of work for way too long, earning whatever number it is my “boss” thinks I’m worth, and I want a career change that gets me out of the rat race.I want to be around happy people (for the most part) doing something creative, that makes me happy, free and lucrative, one that allows me to be my own boss deciding how much money I make, and on my way to living an essential life with multiple streams of income that include me in Europe, writing stories in my free time.

Me and my wife decided to build an ADU on the property so we can increase the property value, and gain additional income passively.

DSCR loans won't use your income to underwrite the loan.

If you qualify conventionally, any bank will use your income, credit and assets to get your loan completed.  

Income tax: A foreign investor receiving rental income from U.S. real property must pay income tax.

Doesn't necessarily have to be DSCR if you can qualify with DTI, employment and income being factored in. 

Do I have to add those $45000 to my income and then I pay taxes and my ordinary tax bracket wiil be the $45000 plus my work income, do I get taxed twice?

When you graduate, fill your space with another student and then buy another house hack while you get started in the business world.Yes, you should work the "boring 9-5" to generate income and qualify for loans.