Hello!
I appreciate that atleast you have segmentized serious bidders against fake one. About this component, here is my understanding we are basically creating voucher mgmt. component, which will be paid in two methods from frontend, 1)paypal 2)offline bank transfer, the phases given here are all interconnected, because see you can not show voucher in front end, unless you have added it to the database and bring it to the front end, so please mention details fields of the voucher what will be a part of it or not.
In third phased you had mentioned about the modules, if am not wrong, you want to create modules of this component only that's fine but what this module will contain? Please explain in details. Pdf creation is fine, email notification - i guess you want for those users who is purchasing voucher online, or maybe you want to mail voucher code on email, but that seems not any complex functionality.
If you will give me your 20 minutes on freelancer chat then am sure, we will get the whole picture ready to launch further.
About me, when it comes to Joomla, am a superman, yep, you can smile a little bit but please go through my profile.
Looking very quick response.
Thanks,
Ankit