Joe,
Here's another thought: convert the Venus 2 to electric and sell the YS when it comes back from service. Use the money that you make off the YS AND the money that you save by not buying another airplane to buy batteries. You need a minimum of 3 packs - 4 is better. You also need some support equipment. I know you're on somehwhat limited funds so spend money on stuff that will let you spend more time in the air. THAT will get you ready for the NAT's and / or a move up to Intermediate. A new airplane is cool but at this point I think you'll get more bang from your buck by having a reliable power system that will let you fly without worries. The Venus is a good airplane especially if you're limited to that smaller size. The electric learning curve is not as steep as it used to be thanks to the pioneering work of many of the Pattern guys. If you go that route, ask questions. I'm sure you'll have plenty of help.

John Pavlick
Team Black Magic, Tech-Aero Designs