All of my Optionor (TB) LOs have costed me about 1% of strike in consideration.  

Thanks for your consideration.

@Daniel Odess makes some very valid points that you need to take into consideration.

The option fee is is just a payment as consideration for the Option to purchase. 

Or also another consideration was a buyer not taking a commission, making that $88k a higher net price than 97% of $90k which would be $87,300 net.

.* Tenants pay a NON-Refundable Option Consideration Fee in order to receive that option.

Taxes are another loss that needs to be taken into consideration. 

There is a new toll beltway being completed through our area, a new 40 acre town center retail/restaurant development nearing groundbreaking, a new huge hospital being built which will draw in many more high incomes, etc.

should this earnest money in this case be solely my fee or should it include other considerations?

Does anyone know of a direct market company that has the ability to draw a map around the areas they want the potential clients from?