60” Demolition Pry Bar & Crowbar – Round Handle Wrecking Bar for Ceiling & Wall Demo – Heavy Duty Nail Puller Tool for Contractors, Firefighters & Home Renovations

5' demo bar will save your back and speed things up. https://www.amazon.com/Gutster-60-Flooring-Demolition-Bar/dp/B06W56LTXD/ref=pd_lpo_d_sccl_3/133-4898643-8669645?pd_rd_w=zzwDN&content-id=amzn1.sym.4c8c52db-06f8-4e42-8e56-912796f2ea6c&pf_rd_p=4c8c52db-06f8-4e42-8e56-912796f2ea6c&pf_rd_r=22DJFXWJBYDV4A6KEZ7Y&pd_rd_wg=xy3Cs&pd_rd_r=6cec6de1-dd98-4449-bf92-687b1f727f5a&pd_rd_i=B06W56LTXD&th=1

Some good nail pullers have been posted already that are nifty for home use but honestly I think that for your situation with those large, whorled, deeply sunk nails and having a few hundred of them, none of these small tools are going to be acceptable. Look for a demolition nail puller or wrecking bar that has a 2' or even longer handle, otherwise you'll be struggling for the needed leverage IMO. Pricier but I think you'll appreciate it. You could also check out the 3' or 4' ordinary crowbars at the hardware store for one that has a nail-pulling cut, might be more affordable for being so simple and traditional. I like the 42" bar in the 3rd link... https://www.amazon.com/Gutster-60-Flooring-Demolition-Bar/dp/B06W56LTXD?th=1 https://ftaelectronics.com/24inch-gooseneck-wrecking-craw-bar-nail-puller-demolition-pry-chisel.html https://www.amazon.com/Spec-Ops-Crowbar-Demolition-High-Carbon/dp/B0GGTV37CX