You no need to pay or to offer the job, first you can check my skills, experience and how I deliver in our skype or phone call conversation, if all looks good then you can decide to offer the work.
Please find attached some examples of my work. Besides customization's, I am happy to advice you the best way to do this and you no need to pay me for that.
MSDN Profile - https://social.msdn.microsoft.com/Profile/krishana%20kumar/activity
Linked In Profile: https://www.linkedin.com/in/krishana-kumar-sharepoint-mvp-0634b613/