Yeah why not
Storm,
Play any/as many tourneys as you can dont get depressed if you get maxed every game, that'll go away with practice (at least it has for us) , having your own kit is no bad thing, don't worry about feeling out-gunned yet, it is still possible to win with less good kit, we have done it a couple of times. You will probably find that you will want to pick up some second hand tourney grade markers.
As to whether you are doing the right thing, can you afford it, can your family cope etc. Only you can know that
Richard (who knows nothing really)