30 Sportcrafts average a little over 8000 lb. Depends on the gear installed, fuel load, the engine or engines etc. If you are only using as a storage type trailer as long as the axle load and tire ratings are high enough, it may be fine. If you would look around at some boat storage lots now you would find that most old storage trailers are not much but only serve one purpose. The lot trailers are not meant for highway travel.