Thanks for all the helpful ideas. The trailer is paid for (plus the insurance payout for the ‘salvage value’) so since the hail storm of 2014 it is on borrowed time, knowing that a major repair or accident would mean the end of the line. Besides the bathroom corner, it is in great shape and I have meticulously looked after minor repairs. Who knows, if I managed to get it properly repaired, it could last another ten years. Or maybe this is the first of inevitable roof failures and more $ to soak into it (pun intended, water damage haha).
I’m not sure I could fix it to satisfaction on my own as been suggested (I would worry about the rotted corner every time I used it) but maybe it’s worth hanging on to. The economy is still soft where I live so perhaps a handyman looking for extra work could work on it in his/her spare time. I would gladly pay $1200-1500 on a casual basis but an RV shop would be prohibitive and not worth the risk if this turns out to be the start of a series of structural issues.
So anyone in central Alberta looking for a project???