Screen printing is an art of itself. If you dont have any experience with printing I would suggest taking a class before buying any equipment you plan on using to produce your own line. It takes a while to get down a good stroke and you dont want to be selling terrible printed products with your brands insignia.
Printing can be very rewarding and if you think you have the passion for it then I would definitely look into it.
One piece of advice, when shopping for equipment go with a used brand name printer instead of one of those "deals" you see online for a brand new press, dryer, etc.. all in 1 packages.
Those machines aren't great, do some research online, find printing community's like this and dont be afraid to ask questions.