If the only internal location of the wire is at the Main and Sub Panel lugs it would be far more cost effective to use AL wire as suggested - just bury it deep and not in the way of your future Pool - HTHDavid, I've not had a problem locating 120/240 20,30,50 amp boxes w/ disconnect at HD - HTH
Ace, If you want 50 amps at that distance you better not buy #6. If no one tells you what size you need I will look it up for you. Tom Y
Maybe it's just time to bite the bullet and call an electrician! That way, if it doesn't work, or it doesn't carry the load, it's their fault.Ace