As far as building a greenhouse, again I just bought a kit from Rion.
There are many types of greenhouse kits you can buy online, just do a
google search. As far as the Hydroponics System, you can pretty much
find all of the parts at Home Depot. What I used is some really thin
wall 8" pipe, I drilled 6" holes, then bought some 5" schedule 40 pipe
and cut about 4" long pieces. This fits as an insert into the 6" holes
that where drilled in the 8" pipe and 5" netted pots will fit right in.
Then all you have to do is put end caps on the 8" pipes, drill 1 1/4
hole on one end and slip a 1" pipe in it so that the water will flow
out to the holding tank. As far as irragation, just a simple drip
system, with a sump pump purchased from Home depot. Put it on a timer
and you are in business.