drop down bed???

Hi, newb here. I have a 6x14 Mirage with rear ramp door that I would like to convert but still be able to haul my bikes to the track and quad out to the hills.
Has anyone had any luck designing a drop down rear bed like you would find in a traditional toy hauler? I was thinking of building a light weight platform that would run up and down four 2x4 rails mounted vertically to the walls, two on each side of the platform bed. I think 1.5" round doweling inserted into holes drilled in the rails would be enough to hold the platform in the up position and a stop at the bottom would support it in the sleeping position.
Of course this would have to be lifted and lowered manually, but seems like it would open up alot of floor space for transport.
Any thoughts?
-Batt
Has anyone had any luck designing a drop down rear bed like you would find in a traditional toy hauler? I was thinking of building a light weight platform that would run up and down four 2x4 rails mounted vertically to the walls, two on each side of the platform bed. I think 1.5" round doweling inserted into holes drilled in the rails would be enough to hold the platform in the up position and a stop at the bottom would support it in the sleeping position.
Of course this would have to be lifted and lowered manually, but seems like it would open up alot of floor space for transport.
Any thoughts?
-Batt