i Like the theme and it is really complete solution

just want to know about below points are some of them are not clear enough on the website

1- is it $85 one time payment , or there is any recurring ?

2- What about if i want to add some modifications to my order , is it possible to proceed with logic extra charges ?

3- is this theme have order tracking , shipping tracking , order status for customer and for supplier ?

4- if i will add another kind of templates ( merchandisers ) like puzzle , do you do the design for me with extra charges ? as you have already 12 templates ( Thank you for that )

Appreciate your help replying me as soon as possible and thank you in advance for your patience :)
Regards
Ammar