congratulations on your pregnancy!
UC is not illegal in germany. a doctor is by law required to have a midwife present at birth. a woman is not required to have a midwife present. but if you ended up birthing at home by yourself you'd have to have the birth confirmed by a physician or midwife afterwards which can be a pain in the butt. you need a piece of paper (birth certificate) signed by a doc or MW in order to file the birth with the german officials (geburtsanzeige). if you did UP in germany followed by a UC, i'm pretty sure you'd be met with an endless storm of negativity after the birth. if you tried to get a birth certificate from a doc and didn't even have a mutterpass, they'd probably give you hell for it.
homebirth is NOT illegal, homebirth midwifes still CAN get insurance. it's just gotten very expensive making it increasingly difficult for independent midwifes to provide birth assistance. basically, the more births a midwife does per year, the more affordable insurance is for her. that means HB MWs who also are part of a geburtshaus are more likely to stay in business.
where do you live? you can enter the first three digits of your zip code (or those of neighboring towns) here http://www.hebammensuche.de/no_cache/hebverz.html
. look for midwifes who have listed "hausgeburt", many also list "englisch" if they feel comfortable providing services in english. if you find one that offers homebirth but doesn't speak english, maybe you could hire a doula to double as translator as well. homebirth midwifes in germany often travel further to their women than you'd think. so call everyone who's even remotely in your area! it's worth it.
if you need help, let me know and i'll gladly see what i can do.
i'm preparing to start a bilingual blog about homebirth in germany so that hopefully in the future more women will have easy access to all the helpful information. unfortunately so far, there's a definite lack of resources about this subject both for german and english speaking families. if more women choose homebirth because more women KNOW about their rights and options, then the insurance issues will no longer keep many wonderful midwifes from attending births.