There are a number of threads in the Repairs and Maintenance on replacing water damaged floors. I suggest you look them over closely and decide if you want to do that on this trailer. It is not an impossible job, but it does take some skill. Unless, of course, you want to pay someone else to do the work.
The peeling decals are a growing problem for all of us. Some folks are opting to just remove them. Others have found ways to replace them such as having a sign shop paint them on or have purchased newly made replica decals. And there are some NOS decals being sold on Ebay.
Depending on the severity of the awning fraying, you might consider patching it with a special tape made for mending awnings. Or new ones can be ordered online or from most RV parts departments.
Unless it was a special order, that trailer will have a rubber membrane roof. That needs to be inspected closely by someone who understands them. That may open up a whole new set of problems or not.
'12 F250 4x4 Super Duty PowerStroke 6.7 diesel
2011 to present: '11 Cougar 326MKS
1999 to 2011: '99 Sunline T-2453
Amateur Radio kd2iat monitoring 146.52