Even if you think you'll probably do the job yourself, it's good preparation to seek estimates from professional exterior home painters near you. Then you'll have a financial point of comparison and you may benefit from what a home painting contractor has to say about the condition of your home, color choices and types of paint available. Let the painter make his pitch for a professional job before you decide what to do. You can still opt to do it yourself while having learned something worthwhile.
I have a brick home so only needed the soffits and fascia painted. They hadn't been painted in over 20 years and looked horrible, but what a difference! It looks brand new. A good primer was applied before painting, clean lines, photographs were sent to me by text showing progress, and they finished in one day. Not a scrap of paint anywhere on the ground when they left. Very impressed! Highly recommend these guys to other home owners. Arvada House Painting