What can I skip?

Still planning my tear-in my head.
I am planning a 4x8, would LOVE a 5 footer but weight and tongue-weight are key considerations for my little car. I see most of even the smaller home made tears weigh in at about 900 lbs. I need to cut 200 lbs, I also need to do it quickly since I am renting my workspace monthly
The natural wood most of you have done is GORGEOUS but I don't have those skills so it looks like paint and carpeting on the interior and either aluminum or fiberglass on the outside.
I still want a functioning galley though (for tailgating).
So, given I don't need beautiful woodwork, what hints are there to save a) time and B) weight.
I am planning a 4x8, would LOVE a 5 footer but weight and tongue-weight are key considerations for my little car. I see most of even the smaller home made tears weigh in at about 900 lbs. I need to cut 200 lbs, I also need to do it quickly since I am renting my workspace monthly
The natural wood most of you have done is GORGEOUS but I don't have those skills so it looks like paint and carpeting on the interior and either aluminum or fiberglass on the outside.
I still want a functioning galley though (for tailgating).
So, given I don't need beautiful woodwork, what hints are there to save a) time and B) weight.