Besides traditional banks to access the equity via HELOC or refinance, what other programs are there via private lenders that will allow me to access that equity?

Downside is bad tenants, depreciating trailer if you don’t own the land, and restrictions if the park if the owned by someone else.

Having access to funds is also good back up (eg line of credit). 

I'm a Realtor w/MLS access.

But if you want low cost, but still have access to that then it's great, as well as all the pyramid scheme programs involved with it :)Personally, I'll agree with @Dan Guenther, that the actual brokerage won't make a huge difference, it is more about who you surround yourself with.

Traditional banks don't have access to the different types of loans.

They also use the term access point which I suspect is a single LAN such that one unit equates to one access point in most cases but the term is not crystal Clear to me.We have not gotten past looking into StayFi.  

If you need to access some of the equity, a conventional cash-out refinance will have the best terms. 

The right title agent/company is absolutely essential to the double closing process.You do want to be aware that some Fannie Mae REO's have deed restrictions to how long you have to hold the property to sell it over a certain amount.In my area, they put in a deed restriction that you can't resell within 90 days for more than 25% over the purchase price.

I have one unit that is specifically made to be wheelchair accessible.