For me, the basic is:
1 - DMM
2 - An SWR/Power meter
3 - A 100Mhz or better oscilloscope
4 - A PC
Nice to have if you are going to do surgery, PA mods, or antenna experiments:
1 - An SDR Play RSP1A with a -50 DB tap and step attenuator to use as a Spectrum Analyzer (SA)
2 - NanoVNA or Antuino (from HF Signals)
3 - 50MHz signal generator
Really nice to have:
1 - 2 GHz spectrum analyzer (Sigelent or Rigol)
All of the DSO Oscilloscopes that I have seen are only good to 1 MHz or so. You really need the 100 MHz to do testing on a superheterodyne transceiver like the uBITX.
I have been pleasantly surprised by the flexibility and usefulness of the SDR Play RSP1A as a SA. Of course, I would really like a Sigelent or Rigol SA, just not ready to spend $1,000+.
Above are my thoughts, others may be different, and YMMV.