Best way to display banner in storefront interior window?

[JERHEMI]

How would you guys recommend displaying a 4' x 4' banner in an interior storefront window? I'm thinking pole pockets on top and bottom with grommets that suction cups can be used to stick to window? Or, maybe there is an aluminum rigid rail that can be secured to top of banner? I'm thinking something similar to the top of a banner in a retractable banner then use suction cups to stick to window. Any recommendations on where to get the rails 4' long? I want the banner to display nicely in the window so it doesn't sag. Also, the customer want to be able to roll it up and transport if needed. Thanks in advance!

 

[Billct2]

Why not hang it from the top of the window (with pole pockets top & bottom)?

 

[JERHEMI]

It's for a real estate office to display in their available units, so it needs to be temporary so they can transport to the next unit when leased or sold.

 

[Mosh]

3 cups on top three on bottom, don't waste your time with a pole pocket or rod.
Cups in the corners and one in the middle of the top will be plenty.

 

[HulkSmash]

screw that. Sell them on new banners for every unit. That's what we do for the big joints out here.