Hello,
I checked your question and as i can see you need an affiliate system which have ability to track links, track sells generated by clients or users, tracks earned commissions of users and also paying them through their preferred payment option, all will be done in word-press, i have a team of five coders and designers and we can build your website.
Now we can build on word-press by custom codes or by using 3rd party plug-in, however we also can build your website in PHP.
Looking for quick reply from you thanks and have a great day :)