Use that cash in hand to develop the product for the Germany/Austria region. Same currency, (almost) same timezone, same taxes, and a 85 Million people market;

Use that cash in hand to develop the product for the Germany/Austria region. Same currency, (almost) same timezone, same taxes, and a 85 Million people market; plus you can also make a dent in the Swiss market later. For the US market, you won't have language problems; buy will havo to localize for (local) sales taxes, etc.