Docks and Hubs

Docks

• TB4: CalDigit TS4 ($379) / Kensington SD5700T ($219 $168) / Sonnet Echo 11 ($199)

The CalDigit TS3 Plus ($209) is a good cheaper alternative to the TS4 with a similar design, but is a TB3 dock with less ports

• modular: Kingston Workflow Station ($79 $69 for dock + reader, $24 $20 for individual reader)
• hard drive docks: Sabrent ($ depends on port bandwidth + number of bays)
  • USB-A: 5Gbps
  • USB-C: 5Gbps / 10Gbps

USB Hubs

• cheaper: Rosewill RHUB-100W ($64)
  • UHS-1 SD card reader + no HDMI/DisplayPort + no USB-C
• better: CalDigit Soho ($79)

PCiE expansion card enclosure

• single-slot PCiE x16: StarTech ($319 $288)
• dual-slot PCiE x16: StarTech ($548 $506)
• triple-slot: Sonnet Echo III Desktop ($1099)
  • 1x PCiE x16 + 2x PCiE x8

other options are also good, these are just a few I found on Amazon from reputable manufacturers