I used to do work like this at home. It's not difficult, however problems occur when it's all goes wrong. Things like- ok lets change the water pump then a stud breaks off in the the block. Then becomes a major hassel when not it a proper workshop enviroment.
I still do servicing oil, filters and consumables like brake pads, shockies and the like, anything more and it's off to the a workshop.
Some blokes wont hesitate but i'm kind of over it now days.