One thought is a cheap throw-away notebook as a placeholder until
something good comes along.
This generation of dirt-cheap Windows notebooks use eMMC SSDs: small,
slow, and soldered in. The M.2 SSDs used in the Acer C720 Chromebook
we have is much better: faster and replaceable (but smaller still).
And the C720 has a Haswell-based Celeron. I discovered yesterday that
it can even drive my UHD TV set (3840 x 2160 @ 30Hz).