BF wants me to move back in

My boyfriend and I had been together since 2016. I moved out in 2020. We do have a child together. We found our way back to each other last year. Although, we were never able to leave each other alone the years we were apart. He wants our son and I to move in with him. I told him I would consider it over the summer hoping I would have more clarity by then. I do still have some reservations bc I moved out previously before and don’t want to have to go through that again.

He lives in a trailer and only has to pay lot rent ($250). Moving in with him makes more sense financially in the rent aspect (rent in my area ranges from $600-1200). However, his last electric bill was 600. Mine is usually around 90-110. So his electric is a huge expense. There’s multiple leaks every time it rains. In the living room there’s a ceiling panel that looks like it could just fall if there’s a large amount of rain. He did seal the roof a couple months ago, but unsure if it fixed the leaks yet.

I feel like if we did move our stuff in there that it would still be his space and not our space. Not only that, but knowing other girls were in there during our time apart doesn’t make it feel like a home to me. I would rather start over in something that was only ours. I know it would be more financially, but am I wrong for feeling this way? I did kind of discuss this with him and he thinks it would be dumb to get a new place and have more in rent, which I agree that rent wise it makes more sense to stay there, but I just don’t know how I can feel comfortable with it being my new home. Any advice?