My first crop got me a big return and even got me a job as a seed shipper with Super Sativa Seed Club (SSSC).
Some credit card company made the mistake of giving me a $500 card. I used it to buy a 1000 watt light and some nutes, and I sent a seed order to the SSSC. Along with the order for some Affi-Malawi I put in an extra like $75 and included a letter describing what high I liked and told them that I was getting married soon and needed a crop to pay for it. Asked them to pick a strain for me - and they did. They sent me a packet of Durban-Chitral hybrid with my Affi-Malawi. I went out and bought Jeorge Cervantes first book ("Indoor Marijuana Horticulture" I think) and treated it like a bible for the grow. I did everything he said to do, including using "Up-Start" and even putting a rusty nail in the nute bucket 'cause it was supposed to add iron (smile).
After a 4-month cycle I harvested just under 4 oz from each of maybe 15 plants. Paid for my wedding, and sent SSSC a letter thanking them for the recommendation and explaining that they really helped me and if there was ever anything I could do... They (Kees) wrote back and asked if I'd be interested in shipping seed orders for them at $10 cash per order. I think I basically fell out of my chair in the hurry to write them back. About 3 weeks later I got a small box of edible goodies postmarked from Belgium (I think, I know it wasn't Amsterdam or Holland); which along with neato chocolates and coffees included a sealed can of soup which had maybe 20-30 balloons of seeds. A couple of days later I got an air mail envelope with a typed sheet with maybe 20 orders - and two crisp $100 bills. I never looked back and shipped a LOT of orders for them over the next couple of years. Business was very good for them... heh...
So from my first crop I got about 3.5-4 lbs, paid for my wedding, and got a killer (i.e. very profitable) job.
First crops can be very rewarding!