The main use of the extra revenue is capital improvements; new roof, furnace, monitored fire alarm system, etc. 

To answer the title of your post, selling fsbo can be a good idea if:- you have experience selling RE- you price the home to sell- you have systems in place to collect inquiries and facilitate showings i.e. call center/email/google forms for screening inquiries, showing agent, lockbox, security alarm, etc. - you have dozens of local agents who can market the property for you and bring you a buyer- you are listing in a desirable area with low-inventory - you are not in a rush to sell

I also install hardwired alarm systems because I've always used them and I appreciate them.  

I hate waking up to an alarm clock although some tasks in my life require it.

There s no reason for anyone I do not know to park on that street aftern10 at night (or virtually any time).To get to my property you go through enough security cameras that it may rival Fort Knox.So ~10:30 a car alarm goes off.  

You can get the cashier's check and do any other banking transactions from the convenience of your home office or mobile device without ever going to the branch with any of these banks. 

Also I found they moved my things around in order to store their things. o  That's what alarmed me, what if they get injured with my tools. 

They are usually advanced types with alarms and pumps and expensive.

But, if they are using RE as a wealth savings device, that is ok with me.

Some alarming reviews on glassdoor...