Currently, I am looking to better understand the real estate market in Southern California. 

Essentially it's totally dependent on the terms/risks that the buyer and seller are comfortable with and everyone understands the transaction. 

Once you find this range you should be very close to understanding your buy box. 

Hello,I'm looking for a spreadsheet to track my entire portfolio (7 properties) with my actual numbers and to see/understand which assets are performing best to least.

Totally understand the struggle of gathering insurance quotes - BP makes it easy for you! 

Yes but depending on the loan type they may want to understand what that payment is.

You lacked the due diligence necessary to understand how this model works.

In the unfortunate event someone passes away and the property transfers via probate or a will, that fair market price gets "stepped up" so no taxes are paid.I would check with a CPA, but this is my understanding.

I understand none is really riskier than the other. 

I am having a little trouble understanding this, as I thought that if a double wide was built and then brought to a lot as brand new.. not having a used one that has been lot to lot.. and immediatly tied down to foundation (slab). that it would then be seen as real estate, and not manufactured?