Congrats on your pregnancy & welcome to Mothering! I joined for my UC & have stayed through for a lot of other great forums. Our 4th baby was a UC & those are natural/ important questions.
There are no legal midwives in my area but I did consult 1 who agreed to do as much prenatal as I wanted. She met me at 20 weeks to get a baseline for growth & said she'd be happy to meet me around 36 weeks to check baby's position. We were a little more strapped by my late 3rd trimester so I went onto the spinning babies website for belly mapping to check baby's position instead, but I was grateful for her input. Anyway, there's time for you to figure that out.
You could lose too much blood & hemorrhage anywhere, hospital or home. There are some herbs/ tinctures you can take at home but it's a far cry from emergency, on hand care; the hospital can deal w/ that far more effectively than you can at home, especially if your #2 & #3 happen at the same time. My baby came out very purple w/ a pink spot only over her chest. She required lots of suction & stimulation & it wasn't given all that gently. Husband's whole attention was (rightly) devoted to her & had I been bleeding I likely wouldn't be here or had recovered enough to go out & do the milking the next day. I am blessed w/ exceptional health & I made sure to do all I could to keep it last pregnancy as well. If you're not/ can't be comfortable w/ that possibility you may want to rethink your options.
We were able to get a doula & she was a blessing during the whole process. She helped me get what I needed while baby was coming, being attended to & when we transferred for a retained placenta. There wasn't magical fairy dust & a chorus of unicorns during this last birth (like there seemed to be at my first home birth, lol) it was harder though just as rewarding & I'd do it again in a heartbeat.
For myself I don't live life based on "what-ifs", it's all already in God's hands. The concerns are real, they do need to be addressed & then at the appropriate time, let go. I see you doing that now by being here, good for you. There are a lot of other great threads in the archives that will likely address any other concerns you have.