My family is looking for a goldendoodle which is considered a "designer" dog. Due to that distinction, the prices we've seen are $2,000-$3,500 for a damn dog.
I understand breeding does have their costs (food, shots, doctors appointments, etc) but if a litter is getting 4-6 pups at a time at $2,000 a pop, that's pretty damn good money!
TL:DR- invest in puppy-crypto