Knock external and internal wall

Looking for someone with building/demolition experience to knock two walls. The first wall is a single story load bearing external wall and includes a double sliding door and a window. The reason for knocking this wall is that I will be installing a 5 panel sliding door once the wall has been knocked. So will need to install a steel beam to take the weight of the roof overhead . The second wall is an internal wall that is not load bearing. Feel free to ask any questions. I will be available to help and can organise tools and equipment needed. Just looking for someone with experience that knows what they are doing. Price is just to get quotes. Happy for you to do a site visit in order to gage the scope of work involved. Will have skip bin on site so don't need to dispose of any rubble or waste. Feel free to ask any questions. Thanks Jack