Your MLS is how you will set alerts for yourself and clients and how you will send out listings to clients interested in homes with 3 BR, 2 BA within a mile of a school say.They seem clunky at first, but the best agents master the MLS so they can use it to their advantage.

Leaving charm and Repairing,Added some electricity, master suite, with private entrance and dressing room.

I've collected rent in bars, restaurants, casinos, WalMart, my driveway, at an armed security gate at a refinery, a medical clinic, a hospital room, and ATM's at a bank and convenience store.  

Sounds like Your thinking of a master lease Or sandwich lease .

However this one had two ground floor additions plus a 700 sq ft second floor master bedroom suite addition and a 2 car garage and it was now 2,600 sq ft.I comped it as a contemporary and came up with $380,000. 

My first was a single family home and I rented out the master bedroom of my two bedroom house.

It was a disaster, but didn't give up.I kept working at it and now we have it all mastered to the finest detail.Our checks now range between 30K to 120K per flip.We just closed on 2 flips, so just these 2 flips in about 4 months provided us with about $101,000.- And we did minimal work.The point I am making here is that your path will define your strategy.Your path will reveal itself based on your decisions, views, strengths and opportunities that you will create and will present themselves.So don't stress it too much.You will come to find you won't have many options when it comes to starting.

Does anyone know where I can get sublease forms for California?

I have found that the squeaky wheel gets the grease.Im not saying to sue (not yet), just saying to explore your options and be able to get advice.Sometimes you can reach out to your local master builders association for referrals for attorneys and consultants. 

I’ve scoured the forums and posts reading everyones suggestions for master key options and I never heard of anyone suggesting this although it’s widely available.