Something like this for desktop would be nice
Avero
joined 3 months ago
about 32ct/kWh including all costs (Germany)
you can add YaCy (p2p crawler) as result provider, but I'm not sure about your own crawler
searXNG is a neat meta search engine and uses multiple sources
They use Googles results with a bit of Bing mixed in. Bangs should work too, like !wiki for Wikipedia or !d for DeepL They're partly owned by an adtech company though (and say they dont share anything).