Any old twin worth it's salt is going to guzzle 25-30gph Avgas. Add to that a minimum cost of $25-30k per engine on overhaul, plus all the rest of the stuff you get stung with on old twins. I've shelled out $35K this year alone in maintenance (bless her heart). Even a financed Tecnam at 5% interest is going to be more cost effective at just 100-150hrs. Everything above that is gravy.
On a LA to NY trip of 2100nm, the Tecnam will burn $825 in Avgas, or $525 (this is airline competitive prices) in Mogas. Compared to my Commander at $2062 in Avgas. Same speed, same power setting. It doesn't take many hours before you've saved enough to pay for that monthly payment...
And come overhaul, you're looking at half the price or less compared to any Lycosaurus