There is no reason to pay contractors the outrageous rates they charge when you have able bodied people in the house to help out. I know what you are going to say, "I can't even get my teenager to take out the trash!", but when you give them the choice of helping or selling everything in their room to help pay for a contractor they will change their tune! You will find that family and friends may be willing to help as well, kind of like people used to pitch in back in the day.
Whenever you are thinking about starting a home improvement project you should talk to everyone in the house about it because the turmoil and disruption concerns everyone. Some projects like painting are easy enough that anyone can do them. All you have to do is protect against spills and make sure you don't get paint on items you don't want painted. Often you can repaint and entire home in just a few days. A fresh new color can go a long way to changing the look of a house.
If you are planning a large project that requires carpentry skills and renovation of rooms then you may have no choice but to hire a contractor unless you are skilled in that area, try The Trades Network for any tradesperson. Another consideration is money, do you have enough money to pay cash for the project or will it require financing?
If you are seeking out help from friends and relatives for your home improvement project don't even bother calling up those that don't take care of their own house. If they don't care about their stuff they surely won't care about yours and all they will do is sit around and drink beer giving arm chair advice and criticism. You should schedule a home improvement project so that you can complete it during a short vacation or long weekend.
Another thing to consider is storage. If you are remodeling your home and need to empty a room, where are you going to put everything? If you are like me, your garage is already full. You should consider getting a temporary storage container. If you think that you could possible reorganize the garage you may want to buy some garage storage containers to help you with the organization and make room for the items you need to remove in the house.