You can perfectly use Sonoff SV for your < 100 WLED project : r/WLED
SV Safe Low Voltage WiFi Wireless Switch Smart Home Module DC 5V-24V Phone APP Remote Contol Support Secondary Development for Amazon Alexa Google Nest Assistant WIshiot: Amazon.co.uk: DIY & Tools
Sonoff SV Safe Voltage WiFi Smart switch module - eWelink Store
Sonoff Sv 5-24v Safe Voltage Wireless Wifi Smart Home Switch Module Support | Fruugo UK