A "couple days of work" could be 3 to 5, U.S. minimum wage is $7.25 an hour, and if you work 8 hours a day that is $174 to $290.
A real wage for a developer in the U.S. is probably 10x that. A company I worked for charged $2000-$3000 for a simple interactive web site, probably more like $20,000 for a serious application with a fair number of screens.
I rarely do "free trials" of products, particularly when I am working for somebody else. Giving a product a fair evaluation could be week or more of work, which won't pay off unless I buy the product. If I am working for someone else I have to not only convince myself but may also need to convince my boss, convince my boss's boss, ...
Similiarly I see all kinds of hand-wringing from people who are afraid that they are going to exceed the free tier on AWS and get a bill for $2.
I am a big fan of low code, I think the world still needs a web-based version of the old Microsoft Access. Why that doesn't exist is beyond me, but I will say (1) Firebase isn't it, and (2) whenever somebody does make one they seem to quickly get bought and shut down.