you could go with thinner wire.
0.15mm, if you are using 0.20 now.
that way you don't have to wind it 4 times more, when you connect them in parallel.
because smaller wire has greater resistance.
I have 0.20, 0.15 and 0.10mm wires, going to test them on 5010 motor from RcTimer.
0.1 mm 1m=2.45 Ohm
0.15 mm 1m=1.15 Ohm
but what option are you going for, to wind with double in one run,
or to wind with single, and then second over it, (keep mind on counting then
)