Be careful - it’s a slippery slope!
I’m only two tools short of a full bike shop imo - I can’t do crown race setting or headset press properly, I’ve bodged it on my road bikes. I’m a Campag guy so everything is expensive, but I’d say that over two years I’ve probably broke even if I’d used a bike shop instead…not counting the hundreds of hours of fun/frustration.
It is good to know how everything on your bike works, because you built it, but you could save yourself a lot of brain ache by just paying up for bike maintenance.