Questions about Sub to Real state

[Jose Alonsoo]

Good after noon real state family.

I have an opportunity to but a sub to property right now. I need some advise from you all before i move forward.

How do you make the mortgage payment? Do you make them under the original owner s name or my own name ?

Can you refinance and how. does the original owner has to sign docs to do that? 

How do you pay for the tax and insurance?

How can you sell it. does the original owner needs to sign any docs to do that?

Any advise will be greatly appreciated

Thank you in advance