Do you own a house or a car ? You could always get a loan on those items.
I like Mike, he is a premier marketer, and has done more importation of Eurpean Champions then any other fancier in the USA that I know of. However, if I had $5000 to "Invest" into my hobby, I have been able to find "proven" breeders from fanciers in need or want of cash, that have advanced my breeding program. This offer, is like buying some lottery tickets, maybe you luck out, maybe you don't. I have no idea how many GFL banded birds make their way to anyone of the numerous One Loft events which he competes in. But, many of them turn out to be fairly average pigeons, just like mine or anyone elses.
One of the best deals I ever made, was when I purchased a daughter of the President, ( a GFL bird) when he was mated to his own daughter, orginal selling price was $6000 and I purchased her, after she had produced $8000 in One Loft winnings, for $2000. She in turn produced my 2007 Flamingo winner and like $5100 in cash. So, I am not the gambling type, I rather go with the "sure" thing. But, hey....that is me.