It is possible to collect [urine] over time... As above... rather than polluting the drinking water when you need to go... have a dedicated container... over the winter, you should be able to collect enough... and... just think of all that drinking water kept clean!
Compost is more about providing soil tilth, trace minerals, and moisture retention, microbial goodness than trying to be a high nitrogen fertilizer...
You could just get chickens with the rest of the country... and allow them to add nitrogen as they keep the compost aerated for you...
Looking forward to hearing how the edible garden does!
I had to search Bowie, Texas.
.
You're up by Oklahoma & the Red river...
Are you in that beautiful red clay I saw so much of out in Oklahoma?