How to make (passive) income with different services as a freelance web developer?

Hi, my question might sound easy on first thought, but quite complex on second thought:How do you make money as a freelance web developer?Well, sounds weird, I know. But hear me out:I´m a fullstack web developer who knows how to host and develop great websites.Recently I started working as a freelance web developer besides my fulltime job. Yey!I have the technical knowledge I need for that profession, but I don´t have the needed “Business Knowledge” yet. At first, I just thought “Well, people pay me for building a website once and that´s it.” But recently I found out about the opportunity of becoming a reseller host. I also know a lot about SEO and SEA. So why not sell those services as well?Goal: I want to build successfull websites and make some passive income where possible.Of course my goal is not to rip my clients off or anything like that.This would be potential services I could sell:Build a technical framework (i use Processwire with some manual adjustments) on which I base my freelance projects on. this saves a lot of time during the development because I don´t have to start from scratchEarn money once by building the website. This is where most of the money is earned.Earn little money by maintenance for updating the website, monitoring the SEO keywords by GoogleSearchConsole and adjusting keywords. E.g. I could charge 1-2 hours of maintenance each quater of the year.Earn passive income by hosting the website as a reseller host. I would usually charge a customer around 10€ to 12.50€ (equals 12$ to 15$) per month for hosting their website. this would generate my some passive income. It´s not much, but its a low hanging fruit and usually hosting contracts last quite long and require little effort. It´s beneficial for me (passive income) and the customer (I save time because I always have the same hoster)I would be happy to hear your thoughts on this topic, how do you make money as a Web Developer? only with Service #2 or also the others?Here are my questions:How much would you charge for the hosting? My reseller server costs me 10€ per month, each new project costs me 2.5€. If I would have 10 clients, the server would cost me 10€ + 25€ per month.How much hours of maintenance do you usually sell your customers? are they interested in this service? do they think seo adjustments and seo monitoring is necessary?Are there more services which you sell your customers?Which customers might need such “all in one” (consulting, development, online marketing and hosting) solutions? small business owners, right?are there any other ways for passive income?I would love to hear your answers, all the best from Austria!

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