However, I'm curious if there are any instances where I could use $900 to lend out and get a good return?

Although some people say that they don't know a single instance where this has actually happened, if banks tomorrow decide to call some of the older notes when interest rates do rise (and they are already rising), I won't be surprised.

Let's say, for instance, I get the land (50 acres) for $100k ($2k/acre).

Join a "big box" brokerage - The training isn't as extensive as many would like to think.

In my certain instance, the square footage documented at the county is HALF what it is in reality so I will for sure have to pay for the appraisal and not rely on tax value.

There were actually three instances I ended up closing for less than what I had initially offered with the way things worked out. 

Sent a BP colleague request and then met for coffee.Prior to that, I worked extensively with a young agent, who had mostly retail suburban clients but was willing to show me every investment property I wanted to see in Milwaukee.  

To my knowledge there is no extension permitted.

I was in a similar situation a year ago (except I do have other debts) and convinced the bank to do a $50K HELOC with the promise of a free extension to $100K after paying down 25K in  0% credit card debt (intro rate that will be paid off as the rate expires). 

There are pockets of course where one was built in a bad location, bad area, or old part of town.Bad location is for instance in a good area but bad access to get in and out and bad sight lines from the road.You have to know what you are doing like any asset class.