Ordinary clip-in-place shelf brackets with slotted metal supports can hold a lot of weight. But some-times they’re unstable and can be easily knocked loose. The play in the slots allows the bracket and shelf to shift from side to side. To prevent this, use your circular saw to cut 1/8-in. deep slots into the undersides of the shelves, aligned with each bracket. When the shelf is assembled, the brackets fit into the slots, eliminating the sway. Also check out: How To Build Floating Shelves.
You’ll want to consider your insurance needs both in terms of the potential frequency of claims against you and the size of the potential liability. You’re also going to want to think carefully about your assets and what you can and cannot afford to lose. A good rule of thumb is to always buy insurance if you can’t absorb the loss of a particular asset without dramatic effect.
I totaly get not wanting to get into the cost part of the shop. We just went through a house renovation, and my stock answer to the ‘how much’ question is either ‘enough’, or ‘enough that was right for us’. There is a quality of life or utility aspect that every person needs to figure out for themselves. And, I would think not having to bounce around from garage to garage anymore has gotta be worth something!
The refrigeration setup in your van is an area where you really do get what you pay for, whether you’re paying in money or in time. The best options are the most expensive. The cheapest options are a pain and/or don’t work very well. And if you try to save money with a DIY refrigerator setup, you could end up spending a lot of time on installation.