Hi,
since you must invest first before hoping for revenues, I think the question you better should ask is: would anyone
who does not know subsim.com buy such stuff? This forum community may buy some due for sympathy, but does this give you any reach beyond this very small pool of maybe-customers - and I would also expect that even most subsim members would not care to buy, even less so with international shipping.
Careful with your money!
You target an absolute niché market.