I wouldn't recommend installing without pulling a permit in order to ensure it's installed up to code.If you truly want to save your tenants money, put a timer and a wrap around the tank.

Unlike most states, in CA compensating non-licensed people is permitted.

Includes permits and knocking down or opening up walls

Background: I was always interested in accumulating wealth at a young age, but fell victim to the cookie cutter mentality of 1) go to college 2) get a good job 3) and die.

Likely a small SFR for my brother to live in while at college just to get a feel for the buying and PM process.

I've been researching and trying to get in to real estate investing since I was a freshman in college in 2005-06.

I'd like to be able to pay for their college with cash flow so I'm in it for the long haul, the kids are all under 3 right now. 

I will give you a shout when in town as I would like to get some perspective on college housing and other opportunities.

If it's not permitted to post that info here, please private message me. 

There were expansions done back in the day without permits.