I agree about checking the tenancy rules, but I would not assume retention always wins. A €677 monthly gap is substantial if the comparables are accurate and the present rent can lawfully be adjusted.
Put numbers against both options: permitted increase, realistic vacancy time, maintenance...
Forty-six days is the figure making me question what is happening in this small segment. During July 2025 I followed Manila townhouses advertised from PHP 24,130,000 to PHP 36,190,000, rather than relying on a citywide average.
Vacant homes seem to follow a different pattern from occupied ones...