do i need a green house at home? i dont have time to shop for  vegies and fruits? if i do really need one how much will spend on building one? and how cani build one.

If you are looking for fresh veggies and fruits, google csa and go to the first hit.  It is a page on Community Supported Agriculture and has a zip code finder for a csa in your area.

I did this and did a trial 4-weeks with a local csa for $80.  It was WONDERFUL!  My skeptical family even liked it.  I signed up for the next 4 weeks as well, but then that was the end of their season.  They wont start up again until spring.  Some csa's go year round, depends on where you live.