If you don't want to do a renovation loan, then one option you can consider is to negotiate with the seller during the closing process. You can first try to buy it without any repairs and see what a bank appraiser says. If the bank appraiser says it's not habitable, then the bank won't finance it. You can then offer a higher price based on the seller getting the repair work done.
It's kind of a long shot, especially depending on how much work needs to be done to pass financing, as the seller may not want to do this; it's money out of pocket without a guarantee that you will be able to buy it - after all, nothing's guaranteed until the closing docs are signed. Plus, if it's a bank owned property, you can probably forget about them doing any repairs.
But at the very least, you can try it, and before you have to make that decision, you will know what the appraiser says is required for the bank to finance the property, so maybe that portion of the work will be minimal ... or maybe you'll be surprised and it will pass financing. We just bought a property in that same predicament ... I thought it wasn't going to pass financing, so my back up plan was to change the financing to the Homestyle renovation loan, but it passed financing so I didn't need to change the financing.
If the seller is willing to do repair work, I think you can do a "hold back" on purchase funds to go towards the repair work ... in other words, title would allocate those funds to the construction company that does the work (based on a fixed bid, I would think). I don't know a lot about the details, but enough about the concept to mention it.