This is a pretty simple question, but I was wondering if anyone has any websites, guides, tips, or anything of the sort that cover common questions and things to be aware of when creating a new brokerage firm in California.

If you are an accredited investor you can also consider investing passively in syndicates which gives all of the benefits of investing directly yourself (cashflow, appreciation, favorable tax treatment) in return for a reasonable fee.Good luck!

Because it's pretty common for people to be interested six months down the line.

Is there a check list or something that people commonly use before giving a loan to be sure that they are protected from common issues? 

The most common types of syndications you will find are known as 506b and 506c.

Usually when a gemini is parceled separately, but have a common wall, there is some type of separation line so each owner knows where their property (and responsibility) begins and ends. 

I would say the most common is 7-10 days.

For example joint tenancy would entitle your mother to inherit the remaining share (this is generally how spouses hold title)  if it is tenants in common you may need to go through probate (this is how business partners generally hold title)

Hi Jake, There are deals that cash flow in Northern Virginia, but they may be less common than in other areas.

They are commonly placed or used on an owner occupied house, but rather unusual on an investment property.