So I did not pay extra for it, but chose it anyway over other places.

This would end up getting you some tax benefits and extra cash flow that could help you leverage that into another property...maybe a 1031 exchange.

Does anyone know of any real estate brokers in California that offers the MLS-only membership as I don't want to pay all the extra fees to be a part of CAR/NAR.

It adds extra protection for your assets.

On our first house we have a standard key and have an extra key onsite in a lockbox in case for any maintenance and lockouts.

The real value of an agency should be in reducing your workload, not adding extra oversight.On a related note, having worked in this field and provided these services myself, I can confirm that the pricing you mentioned for cold callers is too high.

Unless it is a new build, and it comes with purchase warranties are an extra cost and may or may not even be executed when needed depending on the circumstances. 

A few other things I'm considering;- I don't need the extra cash flow to live and am just approaching it to remove the high mortgage interest, but also hedge risk that the current stocks might tank in a few years.- Could take all current cash flow and a few thousand a year to pay off the property in 5-10 years.- Hold for a bit and 1031 into something else but am fairly confident there is not much appreciation to come on this property.

Typically this means they will take longer to close, may not have all the information for the companies they work with, and most hard money brokers get their money by taking an existing product and adding extra points to pay their fee.What is your investor success rate?

I used all the rent and any extra money towards paying them down.