crowd involvement is not all the good of boost. very very small. if you have a good team and goods season that boost is going to be there regardless ( In a talent way).. yes it true it very good for the road. If you have good road players and bench player just made for the road games. The boost really is nothing to scream about.
National appeal Is better because at the end f the day it about money, a young team need the money , more than road game fans cheering for you to win.. Bringing in all new fans and more money is more important than having fan go on the road yell and scream. you actually don't need to have a great team to bring fans for national appeal you just need to win sometimes ... all you need to have is a good team and know some tactics.. also win sometimes .
Some would agrue this point of view and say it would equal more fans than national appeal , the kicker to me is how good is that team. 10 more fans more coming to road game versus 15 unknown new fan plus 15 road fan is the kicker to me ( that not the extact number please don't use its, just example).. Very very small margin of new unknown fans but it helps in the revenue.
. national appeal after some time will gureentee that extra income 2-3 new fans or month and etc. Not much but it really worth for new young team.