Regardless of what saw you use (whether hand tool or powered), I prefer to do the initial break-down of lumber into smaller pieces, outside, before bringing them into my tiny wood shop.
In some situations, you may prefer to do dust-creating operations outside. (e.g. if your wood shop is inside a residential/living space)
In some situations, you may prefer to use noisier equipment outside. (e.g. if your wood shop shares walls with a neighbor's residential/living space)
But there are some disadvantages too:
Unfavorable weather will prevent you from getting your woodworking done, in a somewhat unpredictable manner.
specific tools I'd like to buy, for outdoor use
folding saw horses (ideally they're small enough to store in the back of my vehicle, so I don't have to drag them down the elevator every single time)
the Stanley STST11154 — weighs 6 lbs each, can support 500 lbs each, made of aluminium
folds down to 21 x 10 x 79 cm (two saw horses clipped together)
Toughbuilt C650 — weighs 19 lbs each, can support 1300 lbs each, made of steel, height adjustable, can hold sheet goods using side pegs, has wide feet for working in grass
Toughbuilt C550 — weighs 13 lbs each, can support 1100 lbs each, not height adjustable, has wide feet
folds down to 10 x 12 x 106 cm (one saw horse)
(the lip of my trunk is right around 30" high, so the fact that this saw horse is ~29" high when setup, means it's a good option for this situation)