I believe the business model is wrong. The way is currently set up is not and won’t bring you revenue, not only for maintenance but to grow it to a bonafide business. If you have no direct competition or your search filters are unique compared to other websites that are similar, you can partner up with someone who can market it to, perhaps, a streamer or a platform that already has a good monetization strategy. I think you bring something of value and if you’re inclined, reach out to me to talk more.
It depends on what is the business. If you have experience in marketing for example and the nature of the business requires those skills, you partner up with others that bring the other skillsets needed to build the business.