I've always hated Toy Haulers, for the reasons mentioned (quality primarily but also having the toy area as part of he living quarters). However, a nice toy hauler would really fill your needs. Back several years ago when we were looking at trailers, we did find a toy hauler that had the toy box on the front instead of the back. It did have a bunk in the toy box, but the toy box was 100% separate from the living area. It was made to hold a single fourwheeler or a couple dirtbikes, etc. It wasn't huge but you could probably fit 8 mountain bikes in the garage space. The living area was fairly decent, the cabinets were nice non-rv style cabinets (looked like custom home cabinets). It also had a pop-out that went out the back, so when fully setup, it wasn't cramped at all...not like having multiple side pop-outs, but would be tolerable. It caught my attention not only because of the things above but also because it was fairly light. At the time my buddy was looking for something he could tow with his Tacoma and this fit within the weight rating of the Tacoma.
I guess my point is there are some toy haulers that could meet all your needs and aren't your typical poor quality like you normally expect to see in the smaller toy haulers.