If you have no real reason to neuter him, I would leave him intact. Some years ago, I neutered my then male at 3 1/2 years old. I was never going to breed him, and had 2 intact females in the house. It was to just cut down on the whining, when they were in heat.
FYI, neutered males still mark outside.
Some of my females even mark.
Not all those who wander are lost.
Life is just a leap of faith.
Spread your arms and hold your breath and always trust your cape.
Two things define you. Your patience when you have nothing, and your attitude when you have everything.