Well that’s why I prefaced what I said with the point about not having enough detail for specifics. I went off a rough idea of what any typical smart home gadget I’ve come across would require.
Many consumers care about ongoing maintenance of the stuff they buy, especially smart home stuff. I know I personally wouldn’t touch a new product if I got any impression it would stop working or be abandoned in the future.
Apps sometimes break in some way with new OS versions and need changes to continue working correctly. New devices come out and the app might operate on assumptions that are no longer true, requiring improvements.
Security researchers might find a bug in your app/API/gadget and now suddenly you’re hosting a botnet whilst potentially being on the hook legally and financially. That’s gonna need engineer time to diagnose and fix, ideally proactively.
And yes you’re right, one engineer could do it all, I addressed that in my original comment. If one engineer can do it all well they are going to be expensive, the implication being you could get it done badly for cheap. If OP’s idea is just a scam product then sure, but I’m assuming they actually want whatever their idea is to be successful and not give off a half-arsed vibe to potential customers.
I’m in the same boat as you, with decades of projects I want to be able to open.
However, OP mentioned Reaper, which has a native Linux version! So as long as they’re not using a load of VSTs, and the ones they do play nicely with Linux, it could work out for them
The only way is to give it a go and find out though