I use to do everything myelf. I started doing renos and using second hand carpet, and removing stuff from one house and isntalling to another. Now days my angle is to do things properly. I only use new products, no old stuff unless its something which is a massive saving on.
If time permits i will do work myself, however last week i have a reno in sydney which is straight forward and im too busy to think about it so i paid some tradies to spend a couple of weeks renovating it. total strip out refurb. even down to the light switches.
just depends what you want to archive. I nearly killed myself with a council issue a few years ago..... i built a house from scratch was a great learning curve, however one must decide weather they are a labourer in their spare time? are they saving much, and will they get the same result as the professionals?
Its all personal choice. sometimes you can kill yourself doing too much. I always push myself to those extremes.