You could do it yourself. Just be prepared to not get it done in a day. So you will need some plywood to close the opening over night.
It's also a rather large door, so you will need a few guys to help demo and twice as many to install the new one. I like to have 3 guys on a 6' slider. An 8' would get a few more.
It's also a rather large door, so you will need a few guys to help demo and twice as many to install the new one. I like to have 3 guys on a 6' slider. An 8' would get a few more.