[rsynnott]

While SEPA Instant has a cap (100k), SEPA Slow (or, well, same-day/next-day, the normal one) does not, though some banks may impose their own.

Weirdly, 100k is not an absolute limit; the scheme allows banks to have bilateral agreements to exceed it, though I’m not sure how common this is.

[JumpCrisscross]

What are house payments usually made with?

[lxgr]

Just regular "SEPA slow" (i.e. SEPA credit transfer), as far as I know, unless they're financed by a mortgage/loan anyway.

Some banks offer "rush payments" for that use case in particular, which I believe essentially correspond to either an RTGS payment and a phone call or fax to the receiving bank ("hey, can you check your TARGET2 account real quick for our transfer <reference> and credit your account x for the sum please?"), or just a regular old SEPA credit transfer with somebody making sure that it's not caught in some AML or fraud control queue for several days. It's not a pan-European standardized scheme, in any case.

[rsynnott]

Even if they're financed with a mortgage, the actual payment from the lender will almost certainly be SEPA; very little reason to use anything else.