Will depend on several factors like the type of property, type of tenants, your risk tolerance, other assets you own, your estate planning, laws where the property is located, etc.An LLC is a good idea if you're worried about liability in that as @Christopher Phillips said, any lawsuits would be limited to the assets of the LLC and not your personal assets (assuming you run the LLC appropriately and the corporate veil is not pierced). 

If you were crushing it in the rental world and needed a place to park your cash then rates would factor in much more.

As far as the tax benefits and investing, it shouldn't be the deciding factor of an investment, but it is a fringe benefit.

From all points of view, its design flaw is that it will crash every so often.

Graphic design, sales, over the phone),...Mentors are willing to help when you bring far more value than the cost of bringing you onboard.

Hopefully you have factored into your numbers savings for repairs and CapEx stuff... to me, *that* is your warranty.

And in looking at it you really wont have much gain at all apart from depreciation recapture once you factor in normal closing costs. 

Also, most window companies change their designs and stop making replacement parts on a regular basis.

The biggest factor is the cost of the remodel.  

Our total monthly cash flow is $28 (living for free, plus $28 - this factors vacancy and collection loss, mortgages, reserves for replacement, etc. - I'm the appraiser...).We have nearly saved up $140,000, which happens to be about 20% for the new listing.