Couple of days is too long, most dev teams can create a fully functioning site in a couple of days.
If you focus on providing a solution to a niche market, you can create a platform that allows you to create a fully functioning SEO optimized website in a couple hours. My team develops web solutions specific to real estate, legal, non-profit and professional service industries. We can have a fully functional semi-custom site online within 2 hours and we’re only charging $59/month for this service which includes live data.
Not to tear your down, but this is what you are competing against.
I would advise you to use F12, choose lighthouse, and then analyze page to see all of the issues your site has.
Example of your work? Hard to give feedback with nothing to work with.