As I told Carlo via PM the first step is admitting you have an addiction to bigger boilers
It's not how big it is, it's how you use it. And okay, how big it is.
My cousin and her husband are doing a "home doubling" expansion. Namely a kitchen you can use(the house was built @1910) and first floor bedrooms.
They want a kitchen with a separate tea/coffee area(she is into Teavana) complete with its own water filtering and 3 different water temp dispensers...along with standard tap.
He, along with me, are the coffee snobs. Not sure he'd go for the Quick Mill Vetrano...but something at least half that good is in the mix...
Good luck to your cousin and her husband. I do think the Vetrano 2B is a "steal" even after the preorder price expired and it's gone up to $2299 at Chris Coffee (I got in at $2150 preorder price). It stacks up well (actually surpasses according to people who service espresso machines) to the Alex Duetto III and Rocket R58, both of which cost $2600. The La Spaziale Mini Vivaldi comes in at $2000 but it comes with some caveats (you either choose a plumb-in for $200 more or a tank, 53mm group head vs. 58mm E61).
If you and your in-law are okay with temperature surfing, then there are some HX (Heat Exchanger) machines that you can save some money on vs. the dual boilers. I would advise buying one with a rotary pump. Some will say it's just quieter and a good vibratory pump will be louder but perform just as well. But I can tell you the best shot I ever pulled on my Rancilio Silvia was equal to the first shot I pulled on the Vetrano. Every shot since on the Vetrano has improved and the latte I made this morning is very close to Intelligentsia quality. The stainless steel is of very high quality and cleans up easily. I feel like if you're going to spend over $1500 for a good HX machine, you might as well take that last plunge to dual boiler, it takes the guess work out of having to do cooling flushes, etc. The dual PID on the V2B gives you tremendous accuracy, stability and repeatability in your shot.
I've moved the machine next to my grinder, and put furniture sliders on the feet so I can easily swivel it to refill the water tank (the cabinet won't allow the door to open). I use Crystal Geyser water because it is 3 grains of hardness and highly recommended by the coffee community to avoid scaling. I'm getting good microfoam (but suck at art) despite the machine shipping with the 2-hole tip (a mistake from Quick Mill on the Chris Coffee order). They're shipping a 4-hole tip and I should have it next week, and people say that makes latte-art quality microfoam much easier. I'll keep y'all posted.