I would never buy a trailer or RV with anything less than 1500lbs for family use. I currently have 2,000lbs available in my trailer and as per the CAT scales we have used up 1300-1400lb ready to camp with no water. A full load of water in my trailer is 750lbs.
You have to read the payload stickers carefully - I have seen some that the CCC does NOT include a full tank of water, and some that DO include full water. Makes a big difference.
2013 F-150 EcoBoost MaxTow, Roush tuned (415hp 506tq), lifted on 33s, R.A.S.
2013 Jay Flight 28BHS Elite (Equalizer 10K hitch)