Sounds like you’ve thought this out pretty well! Regarding persimmons, I think the market for fresh virginiana fruits is limited at best. There’s barely a market for non-astringent Asian persimmons. I think the real market is going to be in value-added products like dried fruit, pulp, and baked goods. Also, I think there could be a good market for firm-ripe hybrid persimmons of the varieties that are known to respond to astringency removal techniques. I think @KYnuttrees sells fruit and pulp in season, so he’d be the one to ask.
As for honeyberry, there are some good ways to harvest that I’ve seen like @Viktor 's modified reciprocating saw:
Mulberries might be tricky to market. They’re the sort of thing you could probably develop a small and loyal following for, but people aren’t likely to seek them out. Value-added processing might be the ticket here, too.
Another thing to note is that especially for your more unusual stuff, your market may be more in the cities. Some towns might even have winter markets where you can bring stuff like storage apples or dried persimmons.
Lastly, I’m a big fan of variety, but you don’t want to spread yourself too thin, either. It may be beneficial to focus on a smaller set at first, maybe things with a more sure market, and expand from there.