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This is what worked for me (note I'm doing printing on paper not on t-shirts):

First you'll need a good screen (or five or ten), plus inks (i use speedball generally), squeegees of various sizes etc. These can be purchased online, or find a local silkscreen supplier (for example here is my local supplier in Denver that I use for screens, squeegees and screen tape: http://rockstarscreensupply.com )

Then you'll need to make your press, I made my own for $50 with a power drill and

• hinge clamps: https://smile.amazon.com/Speedball-Hinge-Clamp-Screen-Printing/dp/B001E0FI3E/ref=sr_1_1?ie=UTF8&qid=1480522916&sr=8-1&keywords=screen+printing+hinge+clamps
  
• A thick sheet of masonite whitecoat board. You can get this at home depot and have them cut it to a custom size for you (usually your screen size plus working space. (Mine is quite large at 60"x50")
  
  Screw your hinge clamps into your board and you now have an easily cleanable printing surface that can be placed on a table or desk when in use or moved to the side.
  
  
• You will want a power washer: https://smile.amazon.com/Ivation-Electric-Pressure-Included-Dispenser/dp/B015JBT0BO/ref=sr_1_1?ie=UTF8&qid=1480523129&sr=8-1-spons&keywords=power+washer&psc=1
  or you can bring wash your screens in the shower with soap and water and patience, however if you are using lots of screen coat this gets annoying. If you don't have a hose you can always take your screens to a self-wash carwash
  
  
• If you are using photo emulsion you will need to build a dark space and perhaps purchase or build an exposure unit (although you can use the sun).
  
  
• You can make a drying rack for prints out of clothespins and clothes hangers (simply clip up the prints to dry) or purchase a large drying rack online for $100-200
  
  All said, I built my own home studio for about $500 with all equipment, and have been making lots of nice large scale prints from it. Hope this helps a little.