Try any large home improvement store (Home Depot, Lowes, Menards, Tractor Supply), they should still have some. In fact, I say a pH meter at Lowes for $5 last week. I'd either go to Lowes or some local nursery. Some nurseries are still open during the winter. They would have pH meters & thermometers, but they may be more expensive. You could use any thermometer for now. Just something that will read the temp. I think any place will have a thermometer you could use, even if they don't have a pH meter.

You should be able to find a thermometer & pH meter rather easily. If you don't want to go driving everywhere, pick up the phonebook, and start calling. If you want a nice one, I suggest you buy it online. The ones I have seen in stores are very basic. Just make sure it can read water & soil.

How are you going to light proof your cab? Whatever you do, it needs to be easily removed and replaced. That's the bitch, making it mobile. Ignore the 'pics of inside' comment, I see now you have pics of that. :stoned: