LP fuel Onan 5.5kw generator

I know you have researched this. But, HOW often do you think the Genset will run "just" overnight? As you know, it depends on how hot it is at night. So, in best case scenario, it will run at least 4 hours which will be over 50% of the LP tank. AND, you will need to spend money on a Auto genset system. Nothing worse than waking up at 3am with a extremely warm RV. And have you figured in the loss of quality sleep time when that Genset kicks in 3 or 4 times a night? I doubt you can be immune to that noise. I would think it would be better to have some type of extra Gasoline tank added to your tow truck if you use a truck and use gasoline as the fuel for the Onan. Doug