Dear Corey,
The way you have described, I am doing exactly the same thing for two of my client on [login to view URL]
If they face any issue which is hard for them for don't have enough time to solve themselves. They send to me and I fix that.
On them charge $20/hr and send them weekly timesheet. The time will be round to the upper hours and we are working on general understanding without using the time-watch application provided by the site. This is because sometime the issue get to solve 4hours all together but actually only coding time would be 25minutes if we count. So, this will get complicated which actually to charge 4hr or 25min. Furthermore, it is not the typing job which exactly measured on the page typed or hours takes.
Since, they are also developer they can estimate the workload.
If you are interested then we can also work as like that.
But for that you have change the current project type from fixed price to hourly based.
On the above bidding price $40, I can work for 2/3 hrs for you. However, please share the work/task before, So, I can share my feedback including it is under my expertise or not.
Feel free to contact me if you have any queries.
Thank you.
Regards,
Havit