IMO you need to compare apples-to-apples...
We have 3 kids, so sharing two side-by-side twin beds in a $100/night motel room is no longer very enjoyable... In order to match the amenities of our 2-slide bunkhouse TT, we need a 2-room suite with mini-kitchen (to save on eating out). Friends & family rent 2-room time-share condos for about $1,500/week (peak season) - or about $250/night. Like when we camp, they bring their own groceries & eat-out sparingly...
So last year we camped for 30 nights... That would be $7,500 in condo rental fees... In comparison we spent about $5,000 altogether on camping-related expenses ($167/night). This includes TT payment, repairs, campsite fees, & even the extra gas I use for my daily commute driving my Ram vs. previous Accord...
Therefore, when doing an apples-to-apples comparison, our break-even point is around 20 nights. Anything under 20 nights & we would be better-off just renting a condo for 2-3 weeks. However, anything over 20 nights and we are better-off owning a TT. PLUS, it's much easier to book campsites vs. condos... Some condos have to be booked 1 year to the date and/or you just keep booking the same spot year-after-year... What fun is that? I like the diversity that owning a TT brings. One week we are in the mountains & the next we are on the beach. NICE!
2011 RAM 2500 ST Crew Cab 5.7 Hemi
2011 Primetime 3150BHD Touring Edition
Days camped in 2016-36
Days camped in 2015-37
; Days camped in 2014-31