I've been serious about my drag bike for about 4-5yrs now.. and Its never done.. Its always tore down in the winter for upgrades and maintainence. A drag bike and a tight budget are not a good combo.. You'll always end up spending more then what you intended to spend.. If your serious about it then you need to do things right the first time or it'll cost you alot more in the long run.
As far as the budget axle.. A blaster axle would have been the better choice. The DB axles are supposedly built stronger.. so they use more material which makes them alot heavier then even a stock axle.