Any additional tips for beginners like me would be greatly appreciated!

Goal is to reduce your biggest expense (housing) with income coming from the ADU to save money for your next RE purchase.

But would love a second opinion from a professional.Thanks and let me know if additional info would be helpful.

Code § 7701 - Definitions, my understanding is that the answer is NO, but maybe I am wrong.As the actual rate of withholding is 15% of the sales price, and as the refund (if any) would be "within 90 days", it can be a major setback for my company´s flipping cash-flow because 15% is way higher than the taxable income (and of course than the tax itself), so we would be in the necessity of capital injections to flip the next properties.If any of you have comments on this, it would be very helpful.Thanks in advance

Let me know if you have any additional questions regarding skip tracing.

Additionally, American Express provides credit lines tailored to real estate investors' needs AMEX Blueprint Business.Chase Ink and Navy Federal also offer excellent credit card options for real estate professionals, with the potential for high credit limits up to $100,000.

Just curious is that annual income 40x the monthly rent gross or net income?

You’ve screened their income well. 

We are going to buy a property for purely rental income in Phoenix AZ area with good schools.

If you put your own cash in, the added income is just paying you back later.