To echo what others have said, networking and building a good team that can help you achieve your goals is integral to success, especially when you're first starting out.

I run shorter depreciation schedules for non-integral assets like sheds, fences, appliances, window treatments, etc.     

I have heard of Integrity PM - is this a good company?

Just another perspective, I work for a developer that does their rehabs with integrity, and specifically with the goal of holding onto properties long term and minimizing maintenance costs.

What is the integrity of the houses' systems and when will they need to be replaced (capital expenditures)?

Very smart of you to be learning alternative ways to secure your financial future, as medicine is certainly changing.  

Prob the only place besides D class areas where you can see 2% rule.Btw, I'm born and raised in Sacramento, but came out here for a lucrative career in medicine.

What sources for properties are most valuable for you to have integration with?

-Incredible reputation with local investors, with lots of work done through referrals... and a reputation for integrity, tenacity, and professionalism.  

Why even record the details - use a program that does the integration for you or if you receive checks use a program that when you scan the checks it automatically enters the payment for you in QuickBooks in tenants name.