Percentage commission does not scale down, the work is the same as it is for a 300k or 500k house. 

Because a large percentage of the charges are base fees that do not change based on use!

If so, what would the percentage be? 

However, like winning the lottery, it could occur in an extremely small percentage of time.  

I am now crunching this data for a general percentage (for my area) to apply to my ARVs so that when I buy in early summer my projections can withstand the more lagging market of the fourth quarter. 

This percentage helps maintain a buffer for unexpected expenses and maximizes the chances of a profitable resale.Use Leveraging to Your AdvantageLeveraging can turn a little money into healthy cash flow and increase the potential for returns.

What if the county (or city in my case) has a very low percentage for land compared to the total. 

Depending on how your properties are held will depend on what (if any) percentage needs to be counted. 

How much percentage am I legally required to pay him even though I found the property myself?

Below are some items I’ve seen in teaming agreements.Ownership Interest: Clearly define the percentage of ownership each party has in the property.