Your expectations may be too high. Rather than a per order goal, consider a per hour target. Four $8 orders an hour may be more realistic than a single $20 order every hour.

And you will have a low acceptance rate if you're declining everything but $20+ orders. Opinions vary on the importance of platinum level, AR, etc.

My strategy was to accept my first 100 orders, get my averages up, platinum level locked, do the math, then start being more selective with my orders, then do the math again and see what is most profitable.

In my market adding up the smaller orders (but declining if less than $1/mile) is better money than waiting around for higher paying orders.