Its one thing to sell to your friends but if you want to be a real dealer you should buy these seeds from nirvana, i think this would cost around $75-$85
30 big bud seeds
10 white widow
10 purple power

Big bud will put out large yields but white widow and purple power a popular with good highs. I dont know much about greenhouses, i know people that build and use them but i dont know much about them myself. I could try to find out if you need me to. Goodluck