80 CAD paid up front for 3 hours of work. I often throw in extra hours for free. The following is my normal response for work:
You will see from my ranking on Stackoverflow:
(I can supply the link via chat here on freelancer)
that I sit near the top of MySQL and data access layer technologies and routinely answer the tough questions that stump other developers. I have built exquisite c# GUI's with data components in addition to PHP data layers such as MySQLi and PDO. Prior to moving to MySQL I had over a dozen years with Microsoft SQL Server.
Feel free to grill me on any concepts.
The challenge for you or anyone is in properly defining your tasks. A good start would be to improve your project specs if need be. It takes 2 parties to make for a successful deliverable.
I work thru Skype chat. Can't think of a time I have failed an assignment when it was defined even barely well. And I have been doing this for more than 20 years. In short I over-deliver, or I inform the client of the simplicity and lower the price. If your project is under-spec'd the price may go up.
With those that offer a decent payment for services, I am usually available for quick answers to questions on Skype at any time shortly after projects complete even if off-topic to the original.
Retainer required to start. That is the Skin-in-the-Game for the project owner. Ours is our time.
Good luck on your project whomever you choose, and may it work out well.
-Drew