CBS Money Watch posted an article about some instances when it might be less expensive to pay a professional. Their list included: changing the oil in a car, formal printing jobs, selling valuable personal items and taxes. There is even a website called diyornot.com that helps to calculate if it is worth the money savings to attempt a home improvement project by yourself.
To expand on the explanation of asking a professional to print invitations, posters or other materials, the Money Watch team discussed the costs of ink cartridges, time and frustration.
Mailing is very similar to printing. Using a professional mailer can definitely save you time and frustration. A professional mailer can also update your mailing list by checking for changes of address and identify undeliverable addresses that may only need a small correction.
Mailings can qualify for the discounted presorted rates with quantities as small as 200 items. The postage savings will start to save you money and pay for the services of a professional at surprisingly low quantities.