Dating website business model
As your site catches on and it gets more traffic, a cheap service is going to get very slow very fast.
You'll then have to upgrade to a dedicated server, which will cost you much more.
One solution is to run ads with a service like Google Adsense, or by offering ads through an affiliate arrangement for companies interested in your niche, making commissions for each sale.
If you have another business that offers products or services for singles, or those who are in a new relationship, selling these to your clients is another option – and probably the reason you're thinking of a dating site.
If your niche is for people 50 and over, an app may be optional, at least in the beginning.
But if you're going to cater to anyone younger, a mobile app will probably be more important than your website.
Tinder has a unique selling proposition of connecting users with strangers which they wouldn’t have normally met, rather than connecting with people a user already knew.
Platforms like Wix or Word Press are also an option.
If you're going after local singles, consider making fliers and putting them in the places where they are most likely to hang out.
Because a popular website is going to cost money to operate each month, if you want to keep your service free, you will have to find other ways to monetize it as it begins to grow.
A scalable hosting service is another option, like that offered by Amazon Web Services.
These services also cost about per month if you don't have a lot of traffic, but if your site starts getting popular, the service scales you up and charges you accordingly.