My biggest concern was adhesive quality and potential off gassing so I never bought it.

The biggest question: How motivated is the seller?

I've made friends with some of the biggest and most investor friendly realtors there are, and still not able to get a solid lead for a long term investment, every lead I get it seems the person is no longer doing loans, or the phone numbers are no longer valid.

The biggest problem with this is that you have to convince that active investor that you are worth their time.

The biggest things still yet to acknowleged by him or finished is a couple of outlets not working, track light not working, and he hasn't given me a key to my mailbox.the electrical I'm not to worried about, though I am hand delivering a notarized letter next week about it, mostly It's the mailbox.

Don't overlook the fact that people here have other connections.I think the biggest part of finding investors is learning to communicate.

By the way, the biggest reason most people do a 1031 is not because they paid $400k and now are sellign for $500k and want to defer the taxes on that $100k.  

Biggest downside can be assessing the condition of the property.

The biggest reason it isn't selling... it is probably overpriced.

So much of success is mental and we are often our own biggest obstacle, but we have to acknowledge there is more to success than simple determination.