Hunt for newer truck stalled.

“Saving” aka “savings” and RVs don’t go together. Why be concerned with a few bucks at this stage of life? 

Not sure whyStirCrazy​ throwing dieeel into the mix. That just complicates the scenario as it wasn’t part of it to begin with and will cost more apples to apples than a gasser which is sufficient based on the years of @Oregun posts. 

And nothing has changed. The “perfect” RV for any and all categories doesn’t exist. 
I could add another 10 things each to your +- list. 
But you need to first do an accurate cost analysis. Which you aren’t doing at all. 
For starters, A new F350 CC 4x4 4wd XLT Godzilla motor is less than $60k. 
That doesn’t even consider the rest of the stuff thatStirCrazy​ mentioned.  
You should pencil that out accurately first.  
Just comparing the cost of an almost new F350 Platinum to and almost 10 year old C is like comparing the cost of bananas to milk in the store.

Then there’s what you want and what you will need.  Guessing you’re not young .  How long can you handle what’s required to own and navigate a TC vs a C ?

Do you want more space and storage or is that not a concern?  Seems like it is or you’d be comparing to a very small C or a B .

All considerations 

 The motorhomes I was looking at run about 50k.  Might save 25-30k total after selling camper.

Thinking of 26-27 ft with slide(s) 2017-2018. 

Parking at home wouldn't be a problem.  Could keep my truck to use for hauling.

Have owned truck camper since 1976 and a small Class C for several years too.

what kind of motor homes are you looking at for 50K?  

 Some advantages would be ...

Not unloading and reloading camper when I need to use the truck.  

Easier to find gasser motorhomes with DRW and hopefully no suspension mods and more storage.

More usable space in motorhome and easier for wife to not climb so high into bed and getting the rv ready for a trip.

More sleeping space

 Some obvious disadvantages mostly financial...

Another vehicle to maintain/register and insure.

A little longer for parking than my truck & camper

Any other disadvantages?  What do you think?

do you have electric jacks on the camper?  unloading and loading should be a 10 min job if you do.   I don't know if I would realy cocider this one an advantage.  even with manual jacks and turnbuckel tie downs my old camper takes me 30 minuits to load and less to unload.  I am saving up for electric jacks and fastguns as that will take that 30 min to a 10 min at most.  but ya I get it.  I even try get all my "truck stuff" done before camping season.  

with a dualy your not going to need suspension mods, the other stuff about climbing up I get, but with the rear deck of the new adventures (not sure if yours has it or not) it is way easier for us to climb in than our old slumberqueen with the sissor stairs.  as for the bed, it keeps us young and nimble🤣, I get what your saying though..  

for your disadvantages,

now you can't unload and use the truck for something while your on hollidays, you have to take everything to town with you, and being longer parking is going to be more dificult unless you tow a small car.  

your a little longer like you said so you have to look at bigger spaces, although your not huge that will only be a little bit of an inconveniance, what will be different is the ability to get into off the beatten path type places where you may have to do a little 4x4ing to get in.  the motorhome being longer will be more of a chalange and it will have less ground clearance.  if you don't do that kinda thing then no worries.  this is a huge one for us, as thats the whole rason we bought the truck camper in the first place.  to get to thoes remote places that I would never be able to even dream of getting my 40 foot 5th wheel in.  also for going over the ferry to visit friends.. the 5th wheel is almost 900 bucks round trip on the ferry now, the truck camper is about 200.00

the insure and register is a big one for me, I pay 200/year for 80000 insurance value on my adventurer, thats it.  with a motor home your going to have registration, insurance, inspections (if thats a thing where you live) repairs mechanicly and like you said a place to park it. 

another option is to go a little older in your truck search.  maybe look for a 2014 to 2016 dualy diesel (deisels are way more common because there are so many more of them sold in that market)  that way you could probably get one for 25K maybe a bit more, and save the same amount.