Looking for an afordable small e-cruiser to buy for its components

I heard that buying a small e-cruiser of decent quality is cheaper that buying a cheap kit of decent quality, and that is because the economy of scale as small affordable e-cruisers are produced in larger quantities than affordable entry level kits.
What cheap and relatively good e-cruiser can you recommend me to buy for moving its components to a larger deck (in order to build my custom large board)?