Do a water wash( soak roaches, change murky water till it stays clear) dump water, dry out the now "less stinky roaches. Now smoke as is or do a butane/ISO oil run. The water wash will remove the awful smell & taste.
Oil will be strong.
Unfortunately with bho you are somewhat limited in options. You can always use bigger & longer pipes for extraction. Problem is you need alot of cans to saturate your material. The most I've ran is 3lbs at once. I just bought enough PVC pipe to make about 30 1ft
1- 1/2 tubes. Stuffed them all...