The more you worry, the more complicated it becomes.

Is it complicated to get the permits, etc. 

It's just more involved and hold some complicated risks and costs if not handled correctly.John 

In some ways it's easier and cheaper to open a probate for excess proceeds in California as some personal property probate actions (as opposed to real property) can be less complicated.

You can write anything you want as contingency goes, naturally the more "kick out" excuses you built in, the less likely your offer to purchase will be accepted.and then there are REOs, bank owned properties, those you will have your own contract, then the bank has a phone book size contract that overrules everything in your contract.Sounds complicated but really not once you go through it a few times.

Regarding Short Sales and Foreclosures -I actually heard from many people that these are very complicated.

I don't know why I made this more complicated than it is haha.

There is one more opportunity here Naphat before it gets too complicated too fast.  

The temporary withholding of your exchange funds by the closing agent can complicate your 1031 Exchange if you have a replacement property already identified and ready to close. 

It does get a bit complicated if you sell prior to the timeline I mentioned above and ISOs may create an alternative minimum tax (AMT) liability.