I will mimick what everyone else is saying! Congrats!
I think you have a variety of options and all of them are good paths. If you could find another multi family and get a VA loan on it, that is probably what I would choose. I think with having a new baby, I would rather the multi family than a roommate. While you wait for a multi family, I would continue living in the camper. Once you find the multi family, you could even keep the camper and place it for rent on something like Outdoorsy. Since you are in Jacksonville - you could offer to trailer it and drop it at various state parks nearby (Little Talbot Island State Park, Fort Clinch State Park, etc). I know people who have done this other places in Florida and end up making good money - that pays off the camper AND then cash flows and it is relatively easy! There are lots of people who want to go 'camping' but do not have an RV or do not want to trailer one. Having it dropped at the campsite, and picked up - is so easy. Plus once you are a stay at home mom - that could be your side income, easy to clean them after check outs. Just an idea...
Congrats on your new family and how far you all have already come at such a young age!