Yes, you can achieve significant improvements for around $15K with incremental upgrades rather than the full $30K air ride conversion. Focus on the highest-impact modifications first for your F53 chassis.
The harsh ride on your F53 chassis can be significantly improved with quality gas shocks like Bilstein 5100s, proper tire pressure adjustment, and additional suspension components like anti-sway bars.
ZF front suspension on Tiffin Breeze has known shock inadequacy. Koni upgrade from Tiffin helps significantly. If still bottoming, add Sumo Springs as progressive bump stops. Check for worn bushings, ball joints, and verify front axle is not overloaded.
Knockoff Sumo Springs can work for light-duty RV applications but genuine Sumo Springs offer superior materials, warranty, and safety. Consider your RV's weight, usage patterns, and budget when choosing between options.