I have 10 acres of raw land that I purchased to put a house on that already has a well, power and septic available. 

My other concern is that he is claiming this to 1-stay in the house somehow or 2- withhold rent.

I haven't really exactly figured how much I will need for the business, but I imagine $25,000 would be plenty initially.As a rough estimate, I imagine if I put 20% down + 5% closing costs on a $500k property (what I consider to be an average/nice house in my area), that would still leave me with $165,000 in savings.

I had bought three houses within a few months and I would buy two more a year later.

Collin County seems to be over price, the same than Denton County, though you could find some deals there is always a challenge to find the right one.One thing to take in mind is the maintenance cost, Fort Worth has older houses that will cause issues on the maintenance, if you are looking low maintenance you will need to look a few and identify how you fell comfortable.

Most folks that have good credit scores buy houses, they don't often rent unless its for a short period of time, which is what you don't want as a landlord.

Is it a gamble to move into one of these neighborhoods if the market crashes?

I have a couple of decent size houses coming up for availability and it crossed my mind.

Background:I have a property with a duplex (3bd/1ba & 2bd/1ba), detached house (4bd/1ba) and detached garage on it. 

On my first house hack a few years ago, I was told that I would not be cashflow positive while house hacking.