Welcome from Ontario, Canada.
I am sorry for your loss, Kazzi!
As for what to do!
Well, what would you like to do?
Can you pass on the 13' and move into a new 24' so that you'll still see it and have your memories?
How is the 13' running & how is it condition wise overall?
Any issues with the engine/trans/driveline/electrical/body/frame, etc.?
If not and you have the budget to maintain it long-term, then perhaps go this route and drive it till the wheels fall off and have no payments (assuming you'd have them on a new truck...lol, and hoping you could purchase outright, cash!).
New vehicles, while warrantied, do have their own issues to contend with. Albeit, they are super nice to have because of the warranties, etc.
IMHO, it all comes down to what you have now vs. what you'd like to have.
Either way, welcome to the most incredible global resource and community there is for those of us who love our Ram trucks!