Is it worth buying property in Spain
Personally i think not..
If you was living in Spain before Brexit and managed to obtain your residency then perhaps, if not you now need to apply for a “None Lucrative Residency” permit.
The 90 / 180 day rule has always been in place for the Schengen regions, but no one ever took any notice of the time spent there as checks were never made.
Now after Brexit you passports are stamped and so visitors or home owners are worried that they may be deported or fined.
Unless this three month period is changed, then the very people that keep the winter economy going will fall… making the purpose of a home in Spain none viable.