My only experience with long tails was a Kona Ute. I did not like how it handled and replaced it with a 26” wheel LHT and Extrawheel trailer. So there may be an acceptable long tail out there but I could carry the same w the LHT and trailer and have a normal bike the rest of the time. With that limited experience and your limited budget my $.02, unless you are sure about a particular longtail is to consider a single wheel trailer that can carry two big pannier loads w your bike capable of carrying front and back panniers.
oh heck just read your trailer purchase, well done.
Last edited by LeeG; 09-06-22 at 01:31 PM.