I have never regretted the money I spent on my Felco cable cutters decades ago; they still work like new. If you buy quality tools your work will go better, and you will be able to leave them to your grandchildren.
In my opinion multitools suck. If you try to mount a water bottle cage with a multitool you will see what I mean.
Get a good set of hex L- or T-wrenches and combination wrenches. l like Bondhus L-wrenches with a ball tip on the long end for angle work and a standard tip on the short one for high-torque use.