Even if there is nothing in the lease about smoking, she is still responsible for the damages that her smoking caused.But, with that said, the "age" of the items she damaged also comes into play. 

To lead this process of decision-making, formulate distinct preconditions for investing, among them cash flows, expected returns, tolerance of risks and investment timelines.Good luck!

Most of your worst performers will probably also be your worst homes, whether that's because of neighborhood, age/problems with the house, etc. so that might be a hurdle. 

I understand that anyone over the age of 18 should be listed on the lease regardless.  

Is there a difference based on age or is it based on the age of the roof and the windstorm mitigation done to the house. 

Since you're selling 8 SFRs, this could break up into multiple distinct exchanges (most likely), but you have the option of combining multiple sales into single exchange purchases. 

As long as the distinction stays clear in your mind, I think you will avoid any serious pitfalls.

As my wife and I are both over 45, we require a distinct approach to ensure we can retire within the next 10-15 years without having to work, particularly in physically demanding jobs, until our final days.

Additionally, while it may be tough to hear, age can be a factor in this industry.

Say I did this at age 45-50, so 15-20 years I'd need to bridge until SS and Medicare