Liberal Trump fanfic scenarios aside, the conservative plan for health care is "if you can't pay for it, you suffer and then die." This could be modified slightly to setting up a system by which your income is garnished for the rest of your life to pay for your treatment (not so different than what we have now, except with more pressure to actually treat people), or with a system that forces you to buy shitty health care insurance that you can't afford and which won't cover treatment anyway (ACA does this to some, though with health care that isn't entirely shitty and which might actually cover you).
That's how it is, and anyone who pretends otherwise is stupid or lying. I suppose there's some slight chance they'll blackmail Democrats into supporting some plan which is only 90% as bad as this sounds, so that Republicans don't get blamed for it, but otherwise that's the only template for "replacement."