I feel better that you and your money won't soon be parted. You can drive only one truck at a time and hopefully it will work well enough that you don't need a spare. Or did you plan on building a shed for your growing collection of aging vehicles?
I have begun to think the same of our 1955 Aljoa travel trailer restoration. And there is a particular part that I need that I CANNOT find, I have also begun to think I need a "parts trailer." I mean, we already have 2, what's one more? (I'm pretty sure that's how I ended up with 4 dogs at one point...)