This "why an investor is going to put money in you if your family and friends don't do it" question has been around for long in the startup 'hype' lingo, but I'm very curious if this has actually ever worked for founders that don't come from wealthy backgrounds, or from families with sizable savings (something that is a mirage for middle class families).

If you need 50-75K, perhaps it's better to just go for 100K€ (because things will not go as planned, as some investors will tell you) and, if you can build a solid case based on your business' performance, then reach out to angel investors, as 100K€ is an investment exactly in their ball park (unless your granny is sitting on 1M€ and can spare you 100K€).

PS: these things need proper planning, fundraising is a long process based on trust and personal impressions...so, contrary to what you read around the web, it's unlikely you'll have a lot of success (in Europe, at least) if you just show up of the blue to pitch your case and leave a business card behind, unless your revenue/orders are already solid and you have a realistic plan to multiply their volume/value.