@Eric Johnson -- I realize there's a lot of cautionary feedback to your question giving you the things to watch out for. But, objectively speaking, if you wanted to make this into a full time affair, it is not impossible. When you talk to guys like Rich who own Cornbred, he'll tell you he started out doing the same -- went from small time hobby, to garage, to full warehouse staff getting full day's worth of blue lights and orange glasses. Now, he gets to put crazy mark-ups on his brand of corals and make a decent take...
If you're serious and committed, then with planning, it can happen... but point is you have to put together a solid plan and strategy. And be prepared for some rough patches and risks. Even the most experienced and practiced, wind up losing a whole tank now and then.
I would suggest focusing on a few key pieces that are fast growers or unique pieces you stumble upon but carry value and test it out. You can do that with a single tank. I know a guy that started with one $300 OG, made a tankful of frags, and sold them to BSA for $30K in reasonable of time...so anything OG you buy from BSA probably came from him. (Admittedly, he could've made more on individual sale but time and logistics versus a single transaction came into consideration for him). But moving to full scale, full-time operation requires some capital and appetite.
Gotta spend money to make money, and build relationships along the way.
Personally, I had considered bringing in a shipment of shrooms from a farm abroad with some super pieces for next to nothing. Problem is I need to purchase at minimum quantity, and ship a palette's worth -- the outlay would have been about $5K, with an upside of probably 10X or more, ignoring operating costs. And while this and getting a CITES plus other licenses were all fairly straight forward, the logistical nightmare would begin when the shipment arrives to port at SFO. I would need enough troughs big enough to quickly float and acclimate the shipment and then yet more troughs to be able to support the stock until I unload them all over time. Or in other words....my wife would kill me.
.
So I settle for other means...
Good luck with the journey!