Ahhh, fond memories of the mighty Mojave…
In terms of operating cost, don’t expect any 25-year-old pressurised, complex piston twin to be cheap to operate or maintain
The Mojave was only built in very small numbers (< 50 or so from memory), and only in 1984. Consequently, they’re quite rare. Only 6 on the register here and very few for sale overseas.
Most have reasonable avionics and de-ice and are a heavy aeroplane. They’ll hold 900 litres of gas and go a long way on that, but expect to carry yourself, a change of undies and a toothbrush for payload. Very landing weight limited on short sectors too.
There is an STC for a higher 3,368 KG MTOW based on using a stage of flap for takeoff.
Dunno about the engines being “two hand grenades fused to explode.” Personally found the TIO-540-V2AD to be a nicer engine than the Chieftain’s. Indeed they are the same displacement and horsepower, though the Mojave has an intercooler plus different induction and exhaust setups. The Mojave being the only application of that engine makes it difficult and expensive to get parts at times.
Will dig out the info when I’m home and PM it to you.
Cheers