Saving up for a single 88 keys weighted + counterweighted pianos will be worth it in the long term comparing to buying multiple progressively better pianos. It's similar to shoes: Would you rather buy a decent more expensive shoes that will last your a long while vs a ton of cheap shoes that's more expensive over the same time frame?

• 88 keys allow you to play basically 99.99% of all piano music out there.

• Weighted keys allow you to control dynamics much better since it controls how the key goes down when you press it, and help you get used to playing on an acoustic piano.

• Counterweighted keys will make your keys feel natural, rather the unnatural bouncy/flimsy/plastic feeling when you let go of the keys. 50% of the key's motion is the release/coming up, so it's just as important as weighted keys.

Having these 3 features means you never ever have to upgrade if you don't want to, especially since with digital pianos, the actions is the most important as you can always "upgrade" the sound with VST's.

You’re gonna have to be more specific. What’s your budget, what are your goals, is Bluetooth something you want, and are you already used to the weighted keys of a real piano?

Edit: given the choice would you prioritize on-board sound or feel? (Sound can be changed in MIDI software, especially for the recording purposes, but unless you want to be dependent on a computer all the time, on-board sound is what you’re going to be practicing with. So… sound or feel?) is portability a factor at all?

Basically what I’m trying to say is you specified a very basic feature that I believe most or all digital pianos have nowadays.