I suggest that you speak with a few local Realtors in your area and find out what buyers in your area are looking for. The worst thing a seller can do is work on something that will not help them, and not on something that NEEDS attention.
I have a client who was told by a Realtor to upgrade a bathroom, to the tune of $6,000. However, upon inspection, he should have spent that money on a new roof.
So get a couple of perspectives, also, ask them for other ideas about staging, cleaning, etc. Home buyers want Value. The do not care how much you paid, how much you owe, how much you need to net.
You have a very challenging market and only the homes with the most value and marketing, priced right, will sell.