Actually, don't expect too much extra strength out of cable ties, (zip ties), at the spoke junctions. It might help a little but there's a better reason for doing it - if you do break a spoke, the cable tie will stop the spoke possibly swinging outwards into the chain.
It's a variation of a tip that the BMX downhill racing bikers use, twisted wire and welding/soldering being more elaborate.
I switched bike shops in '08 when the local one, Werners, got right with his prices, and the bikeshop mechanic, Justin, had never seen nor ordered the $35 steel wheel until I started buying them 3 at a time.
When I finished the recumbent last winter, using the newer/better $50 12 g. alloy wheel, I was thinking I might make a switch on my red Sun cruiser. It still had that original Denver wheel, probably has 6-7,000 backroad miles.
It was amazing, true-ing the spokes, only 2 needed very minor adjustment, less than a half-turn. Since he had it up on the stand, Justin decided to look at the bearings, and they were in perfect shape.
So, I didn't switch it out, and it continues to roll.
A small $2 bag of zipties on the front and rear is the cheapest preventative measure to keep the spokes true at our speeds and the road shoulder conditions. If you slam into a pothole at the wrong angle, the $2 spent will save maybe $10-15 in spoke repairs.
When a customer brings a used bike to fit, I'll let Justin true the front wheel. That $5 front spokes checkup gets things rolling on the straight and narrow.