I have wanted to do this for a couple of years and I finally get around to it. I already have a cell boost, which works to some degree, but I wanted to have wifi virtually everywhere. I got a Starlink Gen 3 for our house as a backup ISP and given the Gen 3 has a quick disconnect base I felt I could use it for the house and the van. I mounted the Starlink to the house with a pole attachment and for the van I used the car/boat roof mount. Because I have a roof rack with a perforated floor bolting the mount was rather easy. I had to get different bolts, washers, and nuts to fit the holes of the perforated floor but a quick trip to the hardware store fixed that.
I am still torn whether I want to use 110v with my inverter, or get a 12v power source converter. There are pros and cons for both. The 12v power source converter will save a touch of power but then I would have to use a different router. If I use the standard power source and router with my 110v inverter I will use a touch more power but I will have all stock Starlink equipment which might be more reliable (plus I can control all the settings from the Starlink app). So my short term plan is to run a cat6 permanently to the roof in a clean way and get a router/power source wall mount. I can then grab my dish, the power source and router and simply plug them into the van leveraging the pre-installed cat6. It would take about 2 minutes to hook everything up.
I am going to test out this setup and then adjust from there if I run into issues. I will report back any updates to this post.