It is going to vary somewhat between lenders and appraisers. Some adhere more closely to FHA guidelines than others. And the lower the appraisal rating the smaller the lender pool. I would shop lenders to find one that will work with you.
203b is another option. I'm doing one right now with plumbing issues (among others) where 203b was the easiest option. And even then the first appraiser wouldn't play ball without the water being turned on, but lender was able to use another one that was fine with that.
Standard things most lenders seem to want: Most health and safety items. All systems intact and operational. Plumbing, electrical, mechanical. Roof in decent shape. No holes in floors. Very few holes in walls. Operational bathroom and kitchen. Kitchen needs hot food prep (generally a range), a sink, and some cabinet and countertop space. You can probably get away without a lot of floor cover and millwork.
I think from that picture it is going to be hard to go conventional. Looks like it at leasts needs some electrical/plumbing/mechanical, insulation, drywall...