Best recommendation ..
I could ever give you is one that was given to me. Tow it to a scale and get it weighed! Trailers have a tendency to gain weight over time and so I recommend taking it to a scale and getting it weighed. That will give you a point of reference for towing, making changes, and for the tow vehicle. Over a period of time most RV's will gather items that just never leave the unit. Extra tools, dishes, linen, bigger battery, just stuff like that. Not to mention the brake changes that you are thinking about and the one the previous owner did. So things change.
So did I mention get the trailer weighed?
1966 Mercury Park Lane 4 DR Breezeway 410 4V, C-6, 2.80 - Streamless.
1966 Lincoln 4 door Convertible 462 4V 1971 Ford LTD Convertible 429 4V Phoenix ~ Yeah it's hot however it's a dry heat!