You would be using the external bearing cranks for the new parts then.. for everything that came before you need the crank arm puller to do maintainence,
But as you say Laziness is a character feature, so Hire someone else.
pay the bike shop to do the work for you and they will be happy to do the work .

As noted above, BB axles are hardened steel ,
so what you need is a Carbide cut off disc in a power tool.

OTOH, the crank removal tools are fairly cheap ,
and won't do any hearing damage to operate.