The airplane would be virtually usless to many pilots without LR tanks...but for a modest fee they can be installed...I'd estimate around $5k. If that 180 conversion is at all recent it most likely has the 1760 lb gross weight change.
A few years ago my wife and I decided to buy a new car. An SUV would suit our needs best. Drove several small ones such as Ford Escape, etc. A Lexus dealer was handy so I wanted to drive a Lexus RX300 just for grins. Man was THAT a mistake. Suddenly everything else we had driven seemed unacceptable. We wound up getting a Toyota Sequoia. That Lexus test drive cost us an additiona $25k. What I'm getting at is that sometimes it's a lot better to just be happy with what you have and wonder what it would be like to fly (drive, own, etc.) something more upscale and thereby save yourself tons of money or frustration.
But gosh...I sure would like to fly that 180 hp taildragger. Wouldn't you? <img src="/ubbthreads/images/graemlins/grin.gif" alt="" />