I think you are on right path. Two new tires to the front, least tread or oldest for spare. I have likeD sized MH w22/8.1 I check the air every am when traveling,
On one trip 200 miles and about noon heard large boom and felt a shudder. MH still handling normal I pulled over to do a walk around. 1st thought was tire or windshield on towed jeep. all 10 tires looked good no body damage I could see.
pulled back on freeway ran 50 mph for 15 mins. all good got back to 65 mph for another 200 miles. next am on check tires inner left rear showing zero drove to tire store couple blocks away. asked for tire check. Tire guy tells me all look good but cant get pressure to fill one tire. after pulling tires from left rear I see a 3" dia hole in side wall.
stay safe
TJ