Well, I have had two very successful beautiful homebirths - and am planning for another one. If anything, home is the safest place for you. Don't know if you have had experiences with doctors and bias, but I went into a walk in clinic for a cold and bad cough, and they took a urine dip and said I had high glucose levels. Why would they even check that? They had no reason to - only because I am heavier. Low and behold, their test strips were bad (they also said I had a bladder infection which I knew I didn't have). They did a blood test and my blood sugar was wayyyy low (due to not having eaten in over 6 hours).
That was bias. They were testing for GD because I was heavier. I have never ever had GD in my life. I was in there for a cold. I have no doubt I would not be treated any different if i walked into a hospital to have a baby. In fact, the chance of my outcome being bad is quite high.
When you are at home, your body is allowed to do what it does - for the time that it needs - heavy or not. You are not in a higher risk group for anything during labor. If you have problems with Blood pressure just watch yourself, but I would say that to anyone. Thin peeps have high blood pressure as well.
Best of luck with your homebirth! It will be the most fulfilling of your life. There is nothing like it.