Congratulations on the move.  What about doing a layering shelf system with a sliding ladder and keeping bulky but light items above  like pillows.  so if you are color coordinating  red sections  lamps and breakables on bottom 6feet  2 feet above lampshades etc and bedding and pillows above.  wide shelves for soft items narrow shelves for breakables.  bottom part I would put things that are in boxes or crates.  like candles and mats etc.  Also think about how you select items when you do a job. duplicates can be stored on highest shelfs or items you hardly use.

one complete section for furniture with each type divided and on walls hang small pieces

one complete wall are to hang art work,  easy visibility and access

can use pole sticks to get items down.  Actually I might consider hiring a space consultant to really maximize my space 

- or break it down

how many linear feet for growth  how many linear feet for furniture.  How many linear feet for small item storage - the storage items you want to have the rows running parrallel but with enough space between to get to items easily and to have room to put a cart for pick up.   think of one of those big bargain box stores.  they have metal shelf systems that can be moved around and changed pretty easily.

If you are planning to use only a part of the warehouse buy a shelving system you can add to when you are ready to expand

If you have a lot of big rugs you might want to invest in a rug holder system - something like they have at tj max .

I dont know if any of this helps.  Call me or email me if you want to ask me more questions.