I am Cal State Fullerton graduate in marketing and currently employed at a location-based marketing technology working as a Sr.

Realtors roles will change slightly as technology evolves but they will never become obsolete.

You might run into some difficulty if you are currently financing all 9 properties, but not impossible.The other option that comes to mind is hard money, but that comes with additional costs.

Also how difficult is it to sell 1/3 share if my brother & sister don't want to sell now?

I hadn't even thought of difficulty to fire...

Has anyone done this, what is the process or how difficult is this process?

Just having a lot of difficulty finding a good property.

Crowdfunding, or crowd investing, could allow you to earn above-average ROI and diversify your portfolio among non-local investments, in addition to your efforts in the Central Valley, and without having to devote as much time to due diligence.If you go this route, make sure the platform(s) you choose have a solid track record in real estate investing and technology, and do thorough diligence on all of their deals. 

Assume that to this point in time you have not had any communication with your tenant and take the responsibility of knocking on their door.Lazy technology is the worst form of communication if someone chooses to ignore you.

Each uses different technology too, so even with two that have identical features, one might just feel better to you.