During 9 years of the 10 years we full timed, i had a 15# powertank.com that i purchased from them for $.495.00. I used nitrogen by choice which i filled it with from Industrial Gas supply entity's. It was awesome, very quick, and the 15# tank would last for 1 to 1-1/2 years before refilling for 12-14$. I had a spot for it in the basement, and put quick disconnects on it for the 50' air line i used for the coach and Toad. I Sold it in 2014 for 350$. Best thing i ever did for the inflation issue we all have to address.
Paul A