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

What percentage of your wealth?   

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

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

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. 

They may want you to list the property with them, or they may just be willing to charge you a flat fee or a percentage for bringing you a buyer.

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.

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?

The way to handle it is to allocate expenses based on the percentage of the home’s square footage used for rental purposes.Here’s how it works:Calculate Rental Percentage: Add up the square footage of both the in-law suite and the rented room, then divide by the total square footage of the house.Apply This Percentage: Use this rental percentage to deduct a proportionate share of expenses like repairs, utilities, and mortgage interest.This post does not create a CPA-Client relationship.