I came up with $385,000 to build for material/labor.

To address this I took detailed pictures from beginning to end of my most recent flip, documenting that we did a thorough job using quality materials.   

There are two main ways to utilize this exemption.

What is he charging for the materials?

Easiest thing to do is to utilize your channel manager to create one (most have this feature) or maybe consider houfy.com or craftedstays.co, they are specific for creating direct websites.

I got into RE investing utilizing the same strategy as you're exploring.

@Trevor McCormick to piggyback off what others have said, determine if you are trying to maximize it as an investment or utilize it as a vacation home you will STR to help cover expenses, as this could dictate which type of property you are looking for. 

I have a vision of building and developing mobile home communities in upstate NY that are vertically integrated to allow future members to choose from a catalog of homes, have them installed, provide them with financing options, and make the process of selecting, buying, and living in the community very smooth.Since this is my first time doing this, I would love to chat with an experienced mobile home developer on the following items:Zoning - navigating the zoning process to allow the community to be allowedStart up costs - I am a finance person who would love to better understand start up costs - septic / electrical / water / pads / roads / etcOn Going Maint Costs - in building our business case, I want to build a conservative financial model to capture all re-occurring expenses - utilities, landscaping, capex, septic clean out, etc.I know this is a lot, but would greatly appreciate talking to someone who is an expert in this asset class!

Quote from @Fernando Martin-Gullans: Hey y’all, I’m a retail investor with 2 SFH rentals worth a combined ~$650k looking to utilize some of my stored equity to buy more out-of-state properties, but I’m not quite sure how best to proceed given that my interest rates are incredibly low (leaning me away from refinancing) and neither property is owner-occupied (which I believe prevents me from using a HELOC).

I'd like to take a deeper dive into subject to, wraps and other related things to educate myself and see whether some of these might be things I can actually utilize in my real estate journey.