You may consider that someday you might boon dock for a longer period of time. We boon 3-4 weeks a year. Two Trojan t-125's works for us. Sold my first TT with 10 year old T125's, still going strong. Year four with our new to us TT with two new Trojan T125's going strong. We added 428 watts of solar, which charge on a cloudy days as well, just finished a 5 day and a 4 day boon dock, brought the genny, never used it. I should have solared from the beginning. Ive found you get what you pay for and Trojans arent cheap $400 for the two, but if you amortize that over 10 years its nothing.
Maybe this will help you. Happy Trails