Hawk, I didn’t see the Mexican Buckeye (latin name Ungnadia speciosa) listed in “American Honey Plants” by Frank Pellett 1920. So I have no idea about the honey, but if the tree has flowers like this one from your Texas A&M web site, it looks like a fine addition to have!

I should also note that Michael Dirr DOES suggest a cold stratification for germinating buckeyes (of the species Aesculus)