Towing question before purchase

I have thought about this for a couple days now and finally after reading some of these posts have decided to not purchase this trailer. I do not feel 100 percent comfortable with this set up and do not want to have anything on my shoulders if something were to happen to my family or someone else on the road. It's simply not worth it to me period!!!!! Now back to the original question what would be a safe dry weight of a trailer and length that I could feel completely comfortable with being on the road and if we choose to travel through mountainous terrain also. Also it's hard to find a trailer that has living space without bunks that has more living space in. Any suggestions please let me know

Thanx again for all your responses!!!!!!!!