They and their ilk will burn you out if you don't take back control of the helm.Good luck!

Even if you do everything right, you have no control over the economy and could be underwater. 

You'll have to find an answer based on zoning, demand, and your ability to control the appearance of the additional improvements - you don't want to create a junk yard behind your triplex!

Apparently not in my jurisdiction (but they went easy on one item that had a manufacturing date pre need for permit by removing some of the requirements but did I still needed the permit and associated fees)  Next is AB1482 (rent control).

We always build less square feet so we can capture the highest price per square foot. you can't control your market economics so building and designing and constructing around them is good. 200 sq ft less might be a huge pool or another amenity.

I listen to the podcast every day and I have read all of the BiggerPockets and I also bought a duplex that I am house hacking as my first house (it’s not a very good deal because I realized after that I bought with emotion mostly) but I was just like some advice on how to start my foundation so that I can start my farm area and start to analyzing

Quote from @Joey Andres: Too many landlords get emotionally involved in this process.

The idea is to simply not own anything in your name, but control everything, and making it very difficult to collect a judgment.

It's a little tough to know where pricing and interest rates will be in 3 years, but that's out of our control. 

So many make REI an emotional decision, but it is a business.