Good point. For that jointer planer machine you will need dust extraction but you could throw a harbor freight dust collector cheaply on just that one machine to get by until you one day did a full shop dust collector setup.
But you pointed out why it’s first on my list. If you can’t mill your lumber your limited in what you can do. And if you buy milled lumber you can’t change it or correct it later without the machine yourself. To me it’s the heart of the shop. Especially when combined with a bandsaw. (Unless you want to do everything with hand tools)