Depends on the floorplan. My folks had a Class C for awhile. The bathroom design was so compact you had to sit on the pottie to take a shower. And the housekeeper in the family has to crawl around on the overhead bed to make the bed. Not fun. So they traded for a Class A after a year or so. I inherited that Class A, and sold it shortly afterwards because of the following:
In a motorhome, the passengers can illegally move around to use the pottie or fix lunch. But the law requires them to be seated with their seatbelt on when the motorhome is on the road. So legally, you still have to stop on the side of the road for anyone to move about in the motorhome. Just like you have to stop on the side of the road for anyone to use the pottie or fix lunch in a TT.
The Class C is not very good for running down to Wal-Mart for some quick shopping while you are camped, or for touristing the sights in the vicinity. For that you need a "toad", such as a small car towed behind the motor home. You'll see lots of toads behind motor homes because of the inconvenience of packing up and using the motor home for such shopping and touristing.
When not RVing, the power unit of a Class C must be stored with the camper part. Whereas with a TT, the power unit (pickup or SUV) can be used for something else when not towing the trailer.
For TT floorplan, look for a "bunkhouse" design. Two kids can sleep on bunks, and the other one can sleep on the converted dinette or maybe the hide-a-bed couch if it's long enough. Here's the Skyline Joey Model237:
One problem with TTs is folks want a roomy TT, but they don't want a powerful heavy duty truck to tow it with. So they compromise by having "not enuff truck" to tow the TT without being overloaded. Only the smallest light-weight TTs can be towed by an half-ton pickup (F-150 or GM/Dodge 1500) or most full-size SUVs without exceeding the GVWR of the tow vehicle. For the smallest bunkhouse TTs with GVWR over 5,000 pounds, you need a 3/4-ton pickup (250 or 2500). (My 2012 F-150 is slightly overloaded with my TT that grosses 4,870 when on the road.)
There is no such thing as the perfect commuter car that is also the perfect tow vehicle, so if you can't afford both, you have to compromise. I hope you compromise by having "enuff truck" even though it will not be the best commuter car.
Of course, with the Class C and a Honda Civic toad, You have the perfect commuter car in the Civic. When you store the Class C, you can still use the Civic. Just like you can still use the pickup when you store the TT.
What do I do? I towed a fold-up tent camper for 20 years while the kids were growing up. Then I inherited that Class A and soon got rid of it (6 to 8 MPG). Then I had a very-small 21-foot low profile fifth-wheel towed by a Toyota T-100 V6 "half ton pickup". The T-100 was not quite enough truck for that trailer, so we traded for an F-250 diesel. The low-profile fifth-wheel had the same problem as a Class C in that Darling Wife had to crawl around on the bed to make the bed. She soon vetoed that rig, so we traded for a mid-profile fifth wheel. We enjoyed that rig for over 10 years and towed it about 100,000 miles over that time (197,000 total miles on the F-250). Then a daughter needed the camper to live in, so we gave it up and sold the diesel. But we missed having our pottie handy when traveling, so we bought a small TT and an F-150 to tow it with. We've had that for over a year now, and about 6,000 miles on it. Our F-150 is overloaded by 100 pounds over the GVWR of the F-150, but so far no adverse effects. Next time I'll know to get a pickup with more GVWR.