Looking for ideas, support, advice, anything really.
I purchased an older trailer in 2017 (I would later find out it was a 70s or 80s model Kingston). I paid maybe $1500 and then spent $1500 or so updating the lights to LED, rewiring everything, having the brakes and everything looked at, bearings replaced/ packed, new jack and having the ramp rebuilt. I also repainted the interior myself later that year. Well this year I decided I wanted to redo the plywood that lines the walls and the floor. Much to my surprise when we pulled up the floor the supports and frame were in terrible shape. Most, if not all, of the cross supports need to be replaced and there is a section at least 3ft long on the left side of the trailer near where the horse’s front legs would be of frame that is completely rusted/ rotted through and now resembles c channel instead of rectangle piping. I dropped it off at the welder’s last night and they just messaged me saying the trailer is not structurally sound and is beyond repair (basically I should just scrap it).
I have been using this trailer regularly for the past two years traveling up to 300 miles one way and 210 miles one way with two horses in it. I am TERRIFIED that I have been using it while its been in this condition and am so grateful nothing bad ever happened. I am scared to try to buy a (new) used trailer because I don’t want this to happen again. Would I be okay if I stuck to aluminum trailers (I only have experience with steel)? Should I just wait until I can afford to buy new?