Breaking into modular home development in NJ market

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I wanted to pose this question to the BP community and was hoping someone can provide me with some guidance. I've been heavily involved in rehab / flipping for the past few years and would like to try something new. I was thinking about modular SFH development. The idea is to buy an empty lot in a decent neighborhood and then purchase modular home to put on the site. Outside of the house, I would work on the finishes, materials, foundation, plumbing and electrical. My understanding is that a modular home is significantly cheaper than a stick built home. It also strikes me as an easier development project - a lot of the leg work has already been done by the manufacturer (design, layout, plan). Does anyone has any experience in this space that can give me some advice on some of the challenges? I appreciate any help in advance.