A question for you.......
Do you to instruct for life OR
do you want to fly for life????
If you can get command hours in actual conditions then go for it.....
In fairness it doesn't matter where you get hours (in the beginning) but for your own benefit and the skills that you will come away with afterwards then I would go charter (better in long run). Better command judgements are made (hopefully) in charter work.
Good luck