hi @alpopa! thank you for the encouragement. most of the effort was from all of the previous efforts including yourself (thanks everyone!) that came before that allowed me to add a few patches to move it onward 
for the bootstrap, i used armed bear (which there is a port available in haikuports) to bootstrap the build. it does take some time to bootstrap the build from abcl but with some patches it is quite functional (packages from quick lisp can be loaded in with this port). i have submitted a draft pr link here to haikuports that should include everything needed to build out a haiku package. if time allows, i would like to put some more effort into getting some of the patches that i have into upstream. the patches i have put in are able to get the contrib libraries that were reported earlier to be in a more functional state. the one contrib library that might need more attention is sb-sproof (it is currently disabled in the port submitted). i am open to suggestions if the approaches taken in the patches work well enough for haiku as a starting point. i think getting an initial haiku package for sbcl earlier would be beneficial as that version could then be used to further bootstrap newer versions of itself. from what i can tell so far bootstrapping sbcl from sbcl is a bit quicker than bootstrapping from abcl.
if there’s interest, i can try to make an an interim haiku package available for anyone to kick the tires of the port