I used the funds to acquire real estate that appreciated signficantly.

Yes, he can be sued by the seller; anyone can sue for almost any real or imagined cause.  

You can also check meetup.com or search Facebook for real estate investment groups, clubs, or meetings in your area.

My brother, Fernando Escarcega, and I are starting to invest in real estate.

Make sure you do your due diligence or work with a licensed broker. 

@Toby FellowsYou are correct, you need to ‘hang’ your license under a broker in order to practice real estate, and most brokerages require you to become a member of the National Association of Realtors as well.While you are preparing and taking your courses, contact several brokers and interview them to find out who might be a good fit.

Step 2: Narrow down your "buy box" (are you market-indifferent, are you looking for a certain level of cash flow, etc.).Step 3: Connect with real estate agents and begin making offers!

Hi Everyone, If I only have tenant's birthday, driver license number, and phone number, can I still have a collection agency to help me to collect the delinquent rent?

Quote from @Kaleb Johnson: Hey guys, I am a real estate agent looking to get into property investing.

As @Chris Seveney there are lots of buyers for the real estate backed notes but fewer for the business only notes (without real estate as collateral).