Hi, we've got a family of 4 kids aged 9-15 so space is an issue for us as well. I was also worried about weight and length, so we ended up after many years in several pop up trailers with a 23 ft Jayco hybrid model. Couldn't be happier with our unit. It has a dinette slide out which I highly recommend. Ours is only approx 12 inches deep by about 5 ft long however it opens up the living space immensely. Some of the other slides are 2 to 3 ft out and down the length of the trailer so I highly recommend this option. Our trailer is only 4000 pounds dry however be mindful you can cram a lot of weight in that space we bring 6 bikes plus food/beer/water etc. Love the open air of the hybrids you can hear mother nature when you like and nice and breezy during the day. Good luck.