Please make your bid to install 5 scripts each time.
These are simple php scripts, nothing fancy.
Payment is always after installation concluded.
Who will win this project?
Cheapest bidder wins.
Bidder that is also able to correct bugs that might exist in the scripts.
If you are fast, if you have good communication, and if you are capable of correct bugs and do minor modifications in files like replacing headers and footers etc, than I will always have more work to you.
We install a lot of scripts per month.