And even back then, the security of NNN was suspect in my mind, given that formerly huge companies like toys R us, Sears, Blockbuster, etc. have gone bankrupt.

You got to be willing to deny, even if little Billy next door gets this amazing toy.

Not sure if you are talking about getting to that quickly or over the long-haul, but depending on your capital levels now, I may have an idea for you to take advantage of both the turnkey benefits but also of rolling your money a lot faster to get to your goals.

I'm a car guy so part of my financial independence will be rewarding myself with the "toys" I want...but I'm very much so more in the camp of doing this in a more fiscally responsible way (ie paying cash) rather than taking on loads of debt. 

If you're young enough and in it for the long haul, then any market can work.

RE: finding a bookkeeper -- ironically, I now work for the company I hired out my bookkeeping to (yes, I loved them that much!) 

At least you will take plenty of time and financial freedom to haul your kids to soccer practice.

Then consider garage at 250 ( classic car or toy guy), then add parking/storage at @75 each.

But we're here for the long haul.

Although it can be an excellent source of income over the long haul, there can be  times that you have unexpected expenses that can wipe out a years worth of cash flow.