What is your time worth? This is going to have such a different answer for everybody, depending on their shopping goals, where they live, and their expected standard of living. I live in Seattle, where the minimum wage is $15/hr and the average home is purchased for $600,000. $20 is rather unexciting to me. However, if I were to live in a location where the minimum wage is $8 an the average home price $200,000, that $20 might mean a bit more. Etc.
I do have a set hourly amount I expect to make when I go out shopping ($40/hr) and I do include the time required on site, for travel and to write reports. I also include any "dead" time - where I am stuck on my route and unable to start a shop due to time restrictions. (Though I generally can mediate this by writing reports with this time).
If I am not able to come close to my expected hourly amount, I have a decision to make:
* I could shop anyhow. $20/hr is better than nothing, after all.
* I could decide that it's a good time to relax. We all need down time and a great time to take it is when I can't earn any money.
* I could decide to invest in my business. If I am not finding enough work, It might be worth while to apply to a few more companies - there are at least 150 more listed on this forum to which I have not yet applied. I could also do some planning. For instance, right now there are four $60 shops in a small area - eight hours away from me. I'm interested, but that is certainly not enough money for me to make the trip. So... I should: a) contact the scheduler and see if a bonus might be available, b) look for other shops that would be along the drive, c) look for other shops in the area, d) contact other schedulers I know to see what they might be able to assign me, and e) join social media groups about shopping where I can pick up jobs.
Hard work builds character and homework is good for your soul.