You say that the purpose of your piano is practising at home, yet you finish by saying a real piano may bring a [better] sound to performance.
I think you need to think some more about the purpose of the instrument you're buying.
I am no piano expert, but I have played on:
- The upright piano my parents bought second-hand for £50 in the 1970s
- My piano teacher's baby grand
- Various uprights in my school in the 1980s
- Various weighted electronic keyboards that did not purport to be "electronic pianos"
- Electronic pianos owned by friends
The real pianos vary dramatically in feel, with my parents' piano requiring a much firmer touch than the school pianos and my piano teacher's baby grand.
Electronic pianos felt closer to the baby grand than my parent's upright.
What you can take away from that is that good electronic pianos can be very close in feel to a real piano. The technique you learn will transfer directly to real pianos.
Real connoisseurs can hear the difference between real pianos and electronic pianos. For most of us the difference isn't that important -- and the simulations are getting more sophisticated all the time.
There is a pleasure in being able to open up your piano and poking around at the real physical bits inside. But the downside is that bits wear, they go out of tune, tuning costs money, they're heavy to move, and all the stuff I'm sure you've already thought about.
Whatever you buy, try it first. If it sounds nice and feels nice, you're halfway there.