100 knots / 120 mph cruising is fast enough...
Dream on. You can probably block around 80-85kts. If you can get it up to 100kts TAS in level flight you'll be burning more than 200l/hr and the fabric isn't going to last long in the swamps with hyaenas around. They're cheap enough. If they were a good idea someone would have a fleet of them out there. Manual also specifies two crew (although not necessarily two pilots - one can be an engineer). Not cheap and she uses pneumatics which can be a bit of a bother at times. Taxiing is an art with differential braking reliant on rudder bar position and brakes applied with a huge bicycle type hand grip on the wheel. Sounds like a steam train pulling out of the station when you taxi in a crosswind. As Flyboy says, oil consumption is a bit eye watering as well, around half a gallon an hour if the engine is in good nick.