Don't put in a single run ... put a second in there. You may not need it today, however next year you may find a need and for the cost of a few metres of cable you save all the hassle.
And do you need to lift boards on the ground floor? One easier way with a suspended floor is to get a decent 75 to 100 mm hole saw and use that. Make the hole, feed cables through ... screw a pair of 50x25 battens to the sides of the hole,, drop the cut out back in and a pair of fixing screws.
If you are going through joists - check the rules and make sure you are well down and the appropriate distance from the ends.
M H C
taurus excreta cerebrum vincit