what are my best options?
How good are your carpentry skills?
Reason I ask is that making a folding bucksaw is extremely simple.
If you can measure and cut wood with a saw then you can easily make one yourself from some ready planed timber that you can buy from your local DIY store along with the blade to fit it and there's lots of videos on youtube to show you how to do it
Get the Silky larger Pocketboy 170 or Gomboy 270 or 300. Sure they are a good bit more money but worth it. The longer the better, small ones are for occasional work.
People like the Laplander or Bacho but in truth its not very efficient. Many of those who like it have never used a saw much. A Silky is a far superior tool altogether, and when used correctly is effortless. Trouble is everyone thinks that racing is a good method and duel direction must be better, so they all saw as fast as they can! A saw should be worked at the speed the teeth cut and no faster. Regularly clear the teeth. Done well it will zip through, which is what a Silky does in heaps.
Bushcrafters love the Laplander as its almost a badge of honour. Well I've had a few and doesn't get my vote (I've relegated mine to plaster board use only).
For bushcraft the only reason for sawing firewood is so it can be carried, or dragged. A couple of other nice jobs is to tidy up poles and to cut the odd piece of wood to make things out of. The longer the blade the bigger the piece that can be tackled, but anything too big can't be moved, so a saw only needs to be so big.
Everyone gets frustrated with a poor saw blade. Poor setup and technique adds to the grief. Set up a Silky correctly, take your time and job done. If you a sweating after sawing then you are doing it wrong.
A bow saw with scandinavian blade will out do almost all folding saws and are pretty inexpensive; they don't weigh much either.