we used something similar when I used to work in a warehouse to keep merchandise separated on a truck. This may work for you.
We used a racheting tension bar in our ranger. It lasted a few years before the ratchet gave out, but it's cheap. The decked system surface is slippery so this helped keeping things in relative location.
Keeper - Ratcheting Cargo Bar, 2.5” x 5.2” x 39.5” - Black/Silver, Adjustable from 40"-70" https://www.amazon.com/dp/B0000AZ9KS/ref=cm_sw_r_apan_glt_i_GVE4Y49VCH7CAAP9G649?_encoding=UTF8&psc=1
Most frames will accommodate a commonly available cargo bar to hold plywood inside of the frame. This is just a quick example I found but these are used in semi trailers all the time and you can get ones specced where the failure limit would likely be beyond the surrounding structure itself. It's more expensive than drilling but they can be re-used, and are handy for many other things. It might even be possible to install inside of windows mark-free with rags on the contact pads. Usually if it isn't a structural modification, and it does not damage the property, they cannot do anything about it. It also makes it very clear it was the landlord being an asshat that led to his windows being broken, not anything LAOP did.
This plus a plastic tub with a lid should do it
Item | Current | Lowest | Reviews |
---|---|---|---|
Keeper 05059 Ratcheting Cargo Bar, Adjustable fro… | $27.93 | $27.93 | 4.5/5.0 |
JKCOVER Center Console Accessory Organizer Compat… | - | - | 4.8/5.0 |
^Item Info | Bot Info | Trigger
Item | Current | Lowest | Reviews |
---|---|---|---|
Keeper 05059 Ratcheting Cargo Bar, Adjustable fro… | $28.79 | $28.79 | 4.5/5.0 |
JKCOVER Center Console Accessory Organizer Compat… | - | - | 4.8/5.0 |
^Item Info | Bot Info | Trigger
Item | Current | Lowest | Reviews |
---|---|---|---|
Keeper 05059 Ratcheting Cargo Bar, Adjustable fro… | $28.79 | $28.79 | 4.5/5.0 |
JKCOVER Center Console Accessory Organizer Compat… | - | - | 4.8/5.0 |
^Item Info | Bot Info | Trigger
Item | Current | Lowest | Reviews |
---|---|---|---|
Keeper 05059 Ratcheting Cargo Bar, Adjustable fro… | $27.05 | $27.05 | 4.5/5.0 |
JKCOVER Center Console Accessory Organizer Compat… | - | - | 4.8/5.0 |
^Item Info | Bot Info | Trigger
Wheels and tires when due. They make any vehicle pop.
I keep 2 of these in the back. Super useful. https://www.amazon.com/Keeper-05059-Ratcheting-Cargo-Bar/dp/B0000AZ9KS/ref=sr_1_3?dchild=1&keywords=truck+bed+bar&qid=1633458145&sr=8-3