Hexrays used to be difficult to deal with if you want to purchase IDA Pro for the first time, due to their software getting leaked online.
They have eased the procedure to buy from them, but from time to time they'll ask you to fill out your info with national ID/passport (they say its because they don't want to sell their software to individuals under sanctions). This is despite them being based in Belgium (not the US).
For any serious work IDA Pro is highly suitable (the customization and scripting, loader examples and processor plugins...etc), on the other hand for side projects and basic security research Binary ninja and ghidra can go along way.