A trimmer and a single bit can be used for all kinds of machining.
05:24 Edge guide
00:40 Circle Cutting jig
03:47 Parallel guide
12:57 Freehand routing
06:51 Width fine adjustment jig
15:25 Extension jig
17:11 Flush cut
19:12 2D adjustment jig
22:18 Router Table
Flat cutting with bottom cleaning bit
26:15 Flatting sled

Plan https://photos.app.goo.gl/GY32V9KcVZG...

Trimmer
Brand : RYOBI
Model : MTR-42

Bit
Brand : HOZLY
Model : 401060025

How to make a multifunctional workbench (table saw)    • Making a 10 in 1 Workbench  

Be careful to avoid injury.