New windows and doors can greatly improve the comfort level and efficiency of your home. The installation of them is a moderately difficult project for an experienced DIY person and a helper. If your windows or doors look like the ones below it might be time for an upgrade.
Then again if your cash is short there are many things other than replacement that can add to your comfort and the efficiency of your existing windows and doors. We bet reading a few of the articles in this section can show you how to save those old windows or doors.
You will be trading time for dollars. The question is which do you have more of right now?
To be honest at different points in my life I have been in both situations. And more to the point sometimes it is easier to repair one failing unit than it is to replace them all.
I really have repaired windows in worst shape than the ones shown above and 25 years later they are still in service, doing the job.