we have a TT and a truck to pull with. was going to get wife a little bigger trailer and we looked at some. Last year we had looked at MH's but like you said expensive. Found a nice TT made an offer went back and looked closer told them that I would need to change the amount offered as it needed too much to make ready. Never heard from them again! Was going to look at another wife said she wanted a MH so end of discussion. made several trip to look locally several to another town about 150 miles away. Found some told the dealer what we wanted ....NOTHING! Went to another dealer found one the ac was not good, told himn we were interested but not until ac fixed. Called back and said ac checked out good, no deal. Found one with diesel I liked it, wife said too short. Found another with diesel made offer looked closer reoffered (who ever had had lived in it and it had too many unkowns) no response. Finally looked at Craigslist. Found one 300 miles away made contact drove up made offer got it.
Now with all that said, I liked the trailer as I like my diesel PU! Wife actually likes the trailer just that it is NOT convenient when she want something/potty break etc. So you have a lot of the pros/cons nailed but then it will come down to actual preference. Lotsa nice used C's out there (I wanted/got a B+) and some really affordable, but you are looking at at least a 10+ yo vehicle in most cases. newer will run in $50K ranges but some new can be had pretty cheap on sales at dealers. Most on CL want new prices unless really wanting to get rid of. Ours came complete, rough terrain tow bar, all necessary components hoses, sewer hookups etc so I didnt really have to move anything from the TT. We are on 1st extended trip. Milage is in 8-9 mpg range, some issues I need to address when we get home personal preferences.
Any how we bought a car to tow, so that is an expected if you want to go anywhere easily. Small rv's are not in your future so yes a towd would be needed. Some C's and A's are to be had cheap, friend got a 2002 diesel pusher 40 ft long 90000miles for less than $30K. Gasser models can be cheaper in some places if willing to go with older model. check craigs list for some ideas.
Bottom line is really WHAT DO YOU WANT! What will make it easy for your family. We are enjoying the MH, As I said I liked the TT and truck but yes they require time to set up and go. The MH is much easier in that regard but I could do the TT almost as quick. We have jacks and slides, not on the TT but everything there was manaual hookups and back up etc. If you really want to know what would be better rent an rv for a weekend and see how it works out. I think you will be surprised. Tow cars can be gotten cheap and set up relatively inexpensively if you go MH depending what comes with it.