Having trouble finding affordable travel insurance

Just researching travel insurance for possible week in Spain with family- ouch! Quote from Insurance and Go £1000 or £800.! Some others were just ‘no thank you ‘ even though they advertise medical conditions considered.

Diagnosed with Secondary Breast Cancer 18 months ago but doing ok, CT scans showing stable and just on hormone tablets so now confident to travel.   Disappointed  that it looks like foreign sunshine is no longer likely. Will keep trying but not really hopeful.