Fish room/Business progression thread

So, I'm bored so I figured I would make a thread and at least one person would be interested. Well first of all I'm 14 years old. I talked to my dad and he's giving me a 9 foot long by 5 Foot wide by 8 foot tall room that I can use as a fish room. Right now in the room is a load of crap and giant filing cabinets, that will be moved out within 2 weeks. I currently have three tanks a 55gal,10 gal, and a 5.5 gal that I will be using to start up a small fish business. I'm going to put another $100-$150 to get some shelves for the room and stock the tanks with some fish. After the initially money I put into it i will use the profit yielded by the sale of the fish fry to reinvest back into the business and hopefully expand. I want to stock these tanks with the following:
55 gal- Planted Fancy Guppy tank
10 gal- Taiwan Fire Shrimp(Already ordered)
5.5gal- Not sure,thinking least killies tank?

Let me know on your opinion on the stocking.

I know there will be that one person that is going to say "You can't make any money doing this". Let me just say I have a business plan for this and i'm not just randomly picking out fish, I'm doing a lot of research on care,price, and other things of the like. I have run previous businesses and am currently running one that have made me a decent amount of money. I do know a lot about fish, I know more about fish themselves than tanks. I will keep you guys posted, and any and all questions,comments, and criticisms are welcome.

Here we go

Here are a few reasons i went with guppies:
1)Cheap so small investment
2)Can sell them
3)Easy to breed
I would have done a pair/group/trio of either cichlids or pleco's but they are expensive, I don't have the time to wait for them to pair up, if anybody has a proven group or pair of cichlids or pleco's for a reasonable price I would possibly be interested.

Anybody have any other idea's for the 55gal?

The only thing about convicts is that they have like no value and they are hard to give away for free. I do however have a really nice Juvi Con in there now with really nice blue showing on the fins... He is very durable.