I want performance better than a big one in a space more like a Silvia. Sadly, as quality and price grows, so does counter space (and often height) required. Much of that additional space is air and is being used to make it look more impressive.Given there are about 25 manufactures of decent machines , I appreciate your zeel to create your own, but I think you could get there for less effort.
The guys at Idrinkcoffee often have open box and demo sales and bulk buy discounts. Worth a look and yiou can get every size from smaller than a Keurig to "holy crap" it a monument machines