Welcome @Jimj
Looks like point 1 has been covered
In response to point 2
Unless you are an avid horticulturalist and plan on becoming a breeder you’ll only want female plants… feminized photo or the auto-flower types
Cannabis is not like garlic or dry beans where the “fruit” is actually more seeds.
You can even accidentally stress a female plant to become hermaphrodite to the point of producing seeds if you’re not careful. Outdoor grows also run the risk of pollination by any male plant within a mile or 2.
I was spending 3k/year on weed before I started growing. I’ve spent 25-33% of that total growing my own since 2015.
I don’t have a response for point 3 but am curious how you ended up at alcohol tincture when there are so many other easier less costly and safer choices.
Check out this thread for alternatives.