Looking to purchase set for kids ages 5-12, primarily for 5 year old but others will use it. Have a basement area but would like to keep it portable, 4x8 minimum, possibly more. Like O gauge because of childhood memories, but is HO more reasonable. What brands of ready to run are good quality? WOuld like to stay in $200-$300 range. Not good with hands but the desire is there, in other words, needs to be pretty much ready to run out of box but can learn as we go. Thanks!