Need some help on decisions about a trailer or Toy hauler

I have posted a few times on here and had built a 7 x 16 with some basics in it that we used for motocross like a sink and outdoor shower, we were sleeping on airbeds. We recently had a new baby and now with a family of 5 we are needing something larger. We have 3 dirtbikes and a golf cart that goes to the tracks with us and have looked at toy haulers (for all the ammenities for the wife lol) and granted they are nice but very expensive for the hauling room we would need. I am towing with a 2010 tundra with the 5.7l v8 so I dont have a disel or anything. I got a quote on another lark united trailer 8.5 x 24 with several options like windows insulated floor done electric package and a water package installed which i did on the last trailer included tanks and pump and hot water heater. All of this for about 7500.00 My questions are in the long run which way is better to go. and as far as adding a shower inside what are you guys using for the pan and walls???? Can you buy a preforemed that is light wieght??? What about heat, this is a big issue for the wife?? That would also include a roof top air so that is covered.
Also should i go v nose or flat nose?? I know that if i go vnose then i would not have room to mount a popane tank on the tounge, (for the heat I am assuming)
Also should i go v nose or flat nose?? I know that if i go vnose then i would not have room to mount a popane tank on the tounge, (for the heat I am assuming)