Hi 
@Ladybug24.  Tanks can last a really long time.  When you get into the better tanks (glass) all you do is replace the coil and wash the tank occasionally. 
      I would recommend getting an iStick 30W (
EleafUS Products - Mt Baker Vapor - Electronic Cigarettes $35) mod (battery) and an Aspire Nautilus Mini(
Aspire Products - Mt Baker Vapor - Electronic Cigarettes - $25).  Vape really starts to shine with flavor when you can dial in the wattage (power).  Both the iStick and Nautilus mini are user friendly and top quality. 10% off coupon at COUPONS -  
Stores - ECF E-Cigarette Coupons 
Your current tank with a 510 to eGo adapter ($4) would work on the iStick 30W, as would the recommended tank by the above poster.  
There should be some sales for the 4th of July found here : DEALS and STEALS - 
Deals and Steals | E-Cigarette Forum (go to last couple pages, and "watch thread" in top right of the thread list)
The 30W is in pink.  It is a 2200 mah battery.   
		
		
	
	
 
If you do decide to invest in better equipment, make certain you get at least a 30W battery, as it allows room to grow without having to buy another battery for the next level of vape (sub ohms).  
My journey, Nautilus on vision spinner 2 clone in center and on iStick 50W on right.
 Good luck in your journey.