Any recommendation and good experience?

With your experience working in building materials this could come easier to you. 

There are many HMLs that will finance new construction, but much of it is based on your experience, credit score, and the expected sale price.

Just be aware that there is an experience requirement for these, as well as reserves requirement (6 months PITI). 

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.

Ask how many units they manage and how much experience they have.

There's obviously quite a bit of diligence that comes after such as who the key principles are and their credentials/track record (both balance sheet and experience), the underlying real estate and thesis behind the investment & tax prep and audit procedures but as a general rule of thumb if the investor can't get past the first part which is understanding what they are investing in, passive investing is probably not for that individual. 

In my experience many unlicensed wholesalers operate in a grey area and often cross over into what is obviously brokering real estate without a license. 

From my experience selling RE and building new homes your just not going to please everyone

You save money, you get experience, and then you buy your own in a year.