That would be a $30k loan. He wants to do an equity investment. Meaning he doesn’t expect the $30k to be repaid like a loan, but rather to be paid out 5% dividends of the profits, and also to be able to sell that 5% to another investor, if you guys get aquired or whatever.

A $30k loan would expect regular payments and interest.

Aside from that, there are a plethora of ways to structure deals, and that is for you two to negotiate.

Yes, you would just need a parent or legal Guardian to help you because of all the legal stuff with contracts, taxes…etc.

Medical bills

Pay someone…

Or if you actually want to put effort in, it takes time to learn this stuff, just like everything else. SEO is not some side thought. It is important and should be treated as such.