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

Trimmer
Brand : RYOBI
Model : MTR-42

Bit
Brand : HOZLY
Model : 401060025

How to make a multifunctional workbench (table saw) https://youtu.be/k1wMsF75k_w

Be careful to avoid injury.