Probably best to assume you won't get it right first time and pick up something used to play with. Decently affordable and reasonably close to what you think you need shouldn't be hard to fine given a bit of patience.
Prices for used machines in acceptable condition tend to be quite stable so you shouldn't loose significant money.
Think of it as paying for training.
Nothing like experience to sort the wheat of what you actually want from the chaff of what you think you want.
Without practical experience as a guide even the most careful pre-purchase consideration and analysis tends to become a case study in screwing up by the numbers. Even experienced folk with all the qualifications get it wrong.
Not to mention that once you have got the beast what you actually end up doing is often way different to what you planned.
Case in point I went from BCA to Bridgeport via a Chester Lux style, large square column bench mill. The big bench mill turned out to be classic screwing up by the numbers. Perfectly valid analysis. But, for me, unliveable with in real life. Nothing against the machines considerable capabilities, purely wrong style of machine for what I ended up doing. Full scale, not model.
Beginning with the assumption that first purchase is "starter mill" and being willing to change as soon as you outgrow it is great protection against the sunk cost trap. "Spent a fortune on this so I'm darn well gonna make it work." A great time sink that rarely ends well. Having decided before purchase that you expect to change it makes something to quite to specification much more acceptable too.
Clive