Hi
Since you're so strict with your terms, I'd like to make it clear about some of the points:
1. Please provide the CSV file that needs to be imported into the database.
2. Please provide the invoice template that needs to be implemented.
3. I don't agree working directly only on your server, as it is much slower than working on my own dev server. In the end, I will upload and install/configure on your server.
4. The work will not take only 2-4 hours, for sure, if you think it's only that small amount of time involved you're wrong.
5. The work will be completed in 1 day and you'll have another day to fully test and make adjustments. Please make sure those "adjustments" are not half a project changed
6. The code will be done with Zend Framework, I've been working on it for years, since it's early beginnings. You will get all the code and copy as well as full copywrite but without reselling purposes.
Regards
Dragos