I own the property free and clear and i use the equity as part of my business line of credit.

The risk of "piercing the veil" applies more to LLCs when personal and business finances are not properly separated, not necessarily to individual landlords renting a portion of their home.A more practical approach is ensuring you have a solid lease agreement, sufficient liability insurance (including an umbrella policy), and properly reporting rental income and deductions on your tax return (Schedule E).

Is the way these lenders do business?

They keep different hours so be careful, however they were able to charge me $100 and get my series in place within several hours (stated as 24 business hours).I wish 1. 

I finished my business plan finally recently.

Why are you interested in this business?

This is really going to depend on the state you are looking to do business in.

I don’t see anything wrong with endorsing a business that is great at what it does.

Quickly I learned I knew nothing about the business of trucking and truly didn't enjoy it, as all those gains got depleted.

@Chad CutshallI can't answer for them, but their website doesn't indicate that buying/reselling notes is part of their business model.