Work shop area with interlocking anti fatigue mats. These Matt's are great and well worth the money.
The work bench is very similar to the EAA version I saw on-line and was easy to build. I added a piece of angle iron on one side for clamping, aligning
etc which turned out to be very useful during the build. I bought at least 6 fold-able tables which were continuously in use and very handy.
I cut one of my Vans shipping crates in half and braced them inside with 2 x 4's to make a raised working area when I needed better access to the engine and avionics bays( Also a great help). If I were to give any advice, I would keep the aircraft without gear as long as possible so that you can rest it on its side for easy access to the interior. Once the gear is on, you are always bending on laying on your back which is not always easy, at least for me. Wing racks were also easy to make and also a must.