I am interested in potentially buying a trailer park as the investment is in the land and the tenants rent the lot, bringing their own asset (mobile home) to the location and typically, they stay for the long term. any invoice for a new real estate investor trying to get into this business?

Since it's your current primary, you would need to move out, change your address, and likely get a lease in place before closing on the DSCR loan since the lender needs to prove this is a "business purpose" loan and not a loan on your primary residence. 

Would a HELOC or home equity loan on my personal home be a good idea to fund this?  

I use Coterie for business liability. 

Quote from @Andrew Steffens: I have no idea who that is hahaI have seen an increase in this (like everyone else) because Airbnb spoils guests. 

I'minspired and always on the lookout for new ideas, trends, and success stories.

Before seasoning period ends, I want to sell to my younger brother who purchases with conventional mortgage.Is there anything wrong with this idea?  

Michelle Wang,With all due respect, you should make plans to be in another business once you're out of Real Estate Investing (Residential, Income Property).There are Members of our MassRealEstate dot net Association that come crying to me about similar situations as yours i.e.

Look at buying my first investment property (probably a house in the 100-150k range) and begin looking for a tennant.I can imagine there a lot of different theories/ideas with what one could do here--I am just curious to see what other people think.

I believe this law presents a great opportunity—not only as a sustainable business model but also as a way to help people in need.However, I have no experience in real estate or foreclosure auctions.