Transfer Unity 3D games from a GZ file to my website

Hello. I recently had my commercial website redesigned and put under a new domain name and things have gone well except that the old website had three Unity 3D games/worlds that I now need to transfer to my new website (which is edited using Word Press). I have a backup of the old website on a GZ file (.[login to view URL]) and require a freelancer to first extract the Unity 3D games/worlds from this file (if possible) and then upload them to my new website. Access to the new website and its hosting will be provided. Once the above is done, I would like the chosen freelancer to continually do a bit of casual work for me on an ongoing basis, which will be paid. Basically, there are three Unity 3D games/worlds and they consist of flat planes that are surrounded by hills. On the flat planes are about 2,000 empty plots, which are numbered. Once a month (on average), I will provide a work order of what 3D models (from a library) I need installed on what plots of what games/worlds. This ongoing work will be paid for on an hourly rate. Please feel free to ask any questions and submit your bid for the first part of this project with a proposal that states how much you will charge per hour for the ongoing work. Thank you.