Go to a Golf Course and ask them about less expensive other brands. You will get laughed right out of the car maintenance shed. Push come to shove only one other brand can best Trojan and that is Rolls & Surrette.
Oooo I just had six green-top off-brands shoved on me. You know, the one's that are eight months old - get unequal cells the first week of use then a hard and fast equalization gets them equal again then they go 100 hours then revert to their evil ways. If you really boondock many days (15+ continuous) a year, really cycle off-brand batteries then the day you head home use a hydrometer and find all cells at any level of charge being equal please let me know. Especially batteries that have seen several seasons like this. Unh UNH! no cheating! No taking gravity after having been nursed a thousand hours on a power pole.
How many dollars a year do your batteries cost you? Chew & Spit RVs are not eligible for discussion. Some people drive ALL the way across town to save twenty cents a gallon on gasoline.