If you're young and looking to jump into the game, none of the noise where prices are headed really matters.

It's a constant grind, and I can probably say if I go at this pace, I will look like 60 at age 40.

Welcome to the grind!

Upon interviewing potential tenants, I would explain to them the current situation so that they know that some disorder and noise could occur during their first few weeks/months.  

there's generally some noise from the lender that funds from a 1031 cannot be used but we've argued successfully for clients.  

The market will bear what it can bear...everything else is just noise..

Does it stand to reason that I'll need to plan on 10 properties before I'm able to quit the grind?

The Los Angeles market revolves around relationships and so that's where the vast majority of your deals will come from.If you're a new agent, expect that it will take a least a year of grinding before you get traction.

What would be an estimated ARV and how much less would a house go for just due to noise alone?

I apologize in advance for any noise inconvenience etc.