Don, if you can get a super killer deal on a Tundra that you like, go for it. It will be very reliable but you will be buying 13 year old technology and, while well sorted, it won’t run anything like a more modern design. The interior is dated and the engine and transmission are lacking. A completely redesigned model is coming very soon.
https://www.motor1.com/news/351355/2021-toyota-tundra-engine-rumors/
If you are fine with this, go for it. it won’t leave you stranded. The TRD Pro model would be a good choice for washboard roads. You will not like the stock suspension for those conditions.
You should test drive a regular Ram 2500 with its wonderful rear coil suspension. It drives really nicely. I understand your concerns but I personally would choose a gas powered HD Ram over a Tundra, without any second thoughts.
John Davies
Spokane WA