Read TIME magazine Oct 19, 2009 "Why it's time to retire the 401(k)".Consider a Golden Goose that lays eggs forever (real estate), tax-free and/or tax-deferred forever OR a Golden Egg (401k) that is taxed at ordinary tax rates, is subject to volatility, has a "required" mimimum distribution (ask someone in their 70s-80s how that worked out during the lost decade), offers you very little control, limited investment options, etc.

As someone who has used Scrum (as well as pretty much every Agile development technique) for some of the biggest product companies in the world (I managed a lot of teams using Scrum at Microsoft) and as someone who has flipped a couple hundred houses, this makes absolutely no sense to me.The big advantage to Scrum in a technical development environment is that it allows the customer to change requirements anytime ("requirements volatility"), and because the development is being done in an iterative style (each defined time period you have a working unit or sub-unit that can be demonstrated), each defined time period you theoretically have a working product that can be released to the customer.While there are some advantages to that methodology when developing software, I don't see any advantages when rehabbing a house. 

I know I'm giving very general information and that a lot of this will depend on the stocks held on the portfolio and how volatile they are considered as well as the person borrowing but I just wan't to have a general feeling of what people is doing out there and potentially get some additional contacts for banks working with these type of line of credit. 

Zillow is a joke...their values are too volatile to be of any meaningful help.  

AirBnB laws are strict and subject to change in a volatile environment where homeowners are seeking to limit them from neighborhoods but I have the advantage of living in a "mixed-use" neighborhood and therefore can run it as a business instead of a personal residence AirBnB rental. 

However, the volatility of the housing market makes me very concerned that I am buying at the wrong time. 

Most of the time banks lend/borrow to/from each other overnight.When the Fed "raised rates" in December of 2015, mortgage interest rates actually went down following a few weeks of volatility. 

Gene makes a good point in that CA is a very volatile "boom and bust" market, and this volatility should not be ignored.

Regardless, I like the amazing low volatility of lending club returns.

Have you considered multi-family or another asset class with more consistent income volatility and less risk in management?