This is perhaps the most common comment I hear about having only the second RAAus RV-9, but for my requirements, it is still perfectly adequate. If CAsA want to ramp me, I'll even offer to provide the scales...My BEW is 445Kg, so I have 155Kg payload. Fuel fuel weighs 100Kg, so if I can lose a few more pounds myself, I can (nearly) fill the tanks. My young bloke weighs 20kg in his carseat + my approx. 75-80kg and I have 55Kg fuel, or 70Lts, still enough to go to Brisbane or Melbourne with reserves, or a 2 hour local junket.
No, I'll have around $100K in it now, but I've only just installed ADS-B and bought the autopilot servos...QB fuse & wings, brand new engine, polished with vinyl stripes and an interior I sewed myself. 150% of my cost of 100K = $150K for the Pipestral. You can easily put an RV in the air for under $60K if you are willing to compromise on what you fit and accept the standard kit build times.
I certainly wouldn't be burning an additional 4GPH on top of the published figures for the Rotax, I'd be lucky do be 1.5GPH over those figures, but even so, that's a cost I was willing to bear. As Vans say in their advertising, $50,000 difference in purchase price buys a lot of fuel!
$6,000 for a 10" dynon screen, 1900 for the ADAHRS module, 900 for the engine module, $750 for the GPS, and $3,000 for the transponder, it is easy to run up the costs. I don't need an EFIS or Autopilot or Mode-S in the RV, but it is lighter, and provides a lot more capability. If you are going to use the speed of an aircraft, short of going to Reno, then you're going somewhere, and an autopilot and EFIS makes a lot of sense, even taking into account the costs.