what cargo trailer to start with

This has probably been addressed, but in a search Nothing Specific came up, plz bear with me if the subject has been addressed before and refer me to thenproper thread or threads.
We started insulating an Atlas cargo trailer that we have, had someone all set to do some of the things we felt were beyond our expertise or skill levels. Some of our contacts have changed their minds . Now we are thinking it might be easier to just order an aluminum Cargo Trailer with the insulation, wring, lights, RV door and window already done. We have done some research, but feel we need to hear form the experts, yes, that would be you, for some guidance. Wr want a single axle , 6 X 12 or 7X12 that's. 7 feet high. we really want to do the bed that goes up to the ceiling and comes down at night, to best utilize our space and that requires a 7 ft ceiling. The extra foot i width we would get with one that is 7 ft wide would be a nice bonus. Will be towing with our Volvo XC70, which has a towing capacity of 3500 lbs. For many years we towed a small ultra light camping trailer with this vehicle and have found it does great, even crosssing the Rockies and Cascades. Hitch weight on it is pretty light, so no tandem axel for us. We will only be hauling our tandem trike, which weighs about 80 pounds and our gear, so no need for anythng heavy weight. We are looking for something that has good waterproofing underneath. What brand trailers would you recommend and are there any we should avoid? We are located in MI and were considering RNR because they are in state. Has anyone had exoerience, good or bad, with them? I know everyone has thier own taste and preferences. Any reasons you can give as to why you choose to order the brand you did would be helpful. Also what is a good price for what we have in mind? what is the advanatge of a V nose, versus a reglukar? Thanks in advance, we need all the suggestions and knowledge we can get.
We started insulating an Atlas cargo trailer that we have, had someone all set to do some of the things we felt were beyond our expertise or skill levels. Some of our contacts have changed their minds . Now we are thinking it might be easier to just order an aluminum Cargo Trailer with the insulation, wring, lights, RV door and window already done. We have done some research, but feel we need to hear form the experts, yes, that would be you, for some guidance. Wr want a single axle , 6 X 12 or 7X12 that's. 7 feet high. we really want to do the bed that goes up to the ceiling and comes down at night, to best utilize our space and that requires a 7 ft ceiling. The extra foot i width we would get with one that is 7 ft wide would be a nice bonus. Will be towing with our Volvo XC70, which has a towing capacity of 3500 lbs. For many years we towed a small ultra light camping trailer with this vehicle and have found it does great, even crosssing the Rockies and Cascades. Hitch weight on it is pretty light, so no tandem axel for us. We will only be hauling our tandem trike, which weighs about 80 pounds and our gear, so no need for anythng heavy weight. We are looking for something that has good waterproofing underneath. What brand trailers would you recommend and are there any we should avoid? We are located in MI and were considering RNR because they are in state. Has anyone had exoerience, good or bad, with them? I know everyone has thier own taste and preferences. Any reasons you can give as to why you choose to order the brand you did would be helpful. Also what is a good price for what we have in mind? what is the advanatge of a V nose, versus a reglukar? Thanks in advance, we need all the suggestions and knowledge we can get.