I have walked the Via Jacobi, from Konstanz to Geneva, with details of route and lodging in my blog (see link in the signature block). Your big issue might be timing: July is a vacation month in Switzerland, which is a very expensive place to be. Now is not too soon to book! The range of lodging available beats every other Camino nation hands down - no one else has sleeping-in-straw, and not many have $300/night hotels. If you have the accommodation lists from the Swiss pilgrim association, you can lay out your route, and make reservations attempts starting at the lower price points, moving up as necessary to find a space. Also there are many monastic lodgings, as well as hikers hostels, available.
Remember that Switzerland has truly outstanding train service from everywhere to everywhere, even tiny towns. So you don't necessarily have to spend the night at the point you stop walking; you could hop a train to lodging, and then return by train to resume your walk. It's a beautiful route, especially east of Interlaken, and I highly recommend it.