Don't get married to the idea of property unless you really, really want to get into real estate.

The income from 6 will supplement my actual retirement investments, and 4 will be gifted to my children when they are married or have children.  

But that's not really an option for me at the moment since I am married with 2 kids in school.

It is when you own it and have it as your primary residence for 2 of the last 5 years you can take a gain of $250K individually or $500K if married tax free.

So those are the stories of I'm married and haven't seen my husband in 20 years. 

For married couples, is it recommended to create LLC with husband and wife both inside of LLC or one member LLC for easier taxation as single member LLC ?

If this is a man and woman married couple. 

I never liked these because basically you are married to the property.

It's a federal crime to commit mortgage fraud, so recommend you and your wife actually owner-occupy each property as you've indicated - change your driver's license, your address with your company, report on your income taxes (you may have to file Married Filing Separately), etc. 

I am aware of the 2 in 5 rule, and have lived in the residence for 20 of the last 60 months, so just short of meeting the capital gains requirement to deduct up to $250K single/$500K married in gains.