BB The woods you mentioned are proven bow woods used by manufacturers throughout the last several hundred years. Other woods may well make good bows(oak ash etc), but not for all designs, maybe just flatter, wider bows. Some of those woods can be used for narrow bows like ELB but they need an extra process, like heat treatment, and or heat reflexing to give good performance. Extra labor time increases the cost of bow, more so than use of ideal materials.
Another option is to glue up edge sections of a tough bamboo eg tonkin cane(power fibres, not the softer pith). Its different to the way you make your boo bows because only the backing is left with nodes. The belly is tillered like a regular wood bow, and doesn't have, belly with intact nodes. This method sure is a lot of extra work, but was highly regarded in the pre fibreglass era, for top of the line performance, and shootability.
You can buy boo floor boards already glued up. They can make a nice shooting bow when backed. They need reflexing to avoid excessive set though. This is likely due to higher content of pith as they are not planed to maximise the content of power fibres.
A word of warning if you try the floorboard method, thickness sand the finish off first, because it blunts plane blades rather quick.