1+ with Hoop...HD bought and paid for, setup like you want it, servicing mainly by yourself, proper storage, draining all fluids, oiling the cylinders, putting on the lift, etc. you should be good.
But have to say vacuum tubes are okay for guitar amps, but modern (not 70's) solid state amps with proper design will be superior in just 'bout everywhere else. Big problem with early solid state equipment was direct coupled designs with experimental high power pass elements operating at their limits would self destruct if one part of the circuit broke down or speaker wire fell off or the like. Modern designs with active cross over networks make sonic effiiciency and long life standard fare these days, obsolescence being the main casulty of modern electronics...just happens.