Even if they do offer this to the small farm/hobbyist, I don't think this would be too popular.  The resale value on these would be terrible, especially with that 3 month warranty.  An aside note as well, I love building mining rigs myself.  I love playing around with new computer hardware and being able to have it pay for itself and even make a profit. 

Anyway, these really do only make sense for larger farms.  If I was a larger farm with not alot of time to spare, buying prebuilt miners is the way to go.