The situation: A family member would like to be a silent partner and supply the equity for a buy-and-hold deal.

If he's putting in $150K cash, plus the value of the land (~$150K) and I'm supplying access to the loan ($350K) then the total value would be ~$650K for a built property.  

However, there's no guarantee how long that would be (or at least, I don't have enough knowledge to know--if you know, say, with good evidence, that 2 years from now the prices will drop significantly then waiting is prudent).If there is no real evidence of large, detrimental economic factors going on (war, people moving out of the Bay in masses, an unusual amount of new construction making the supply on houses extraordinarily large for a prolonged amount of time), then there is no reason to assume that the seller's market will swing back to a buyer's market any time soon.The fact remains that the population in the Bay is growing year after year, tech companies are still expanding (to such a point where they are closing down Gold's Gyms, grrr, but that's another story), and this is still a highly desirable place to live.  

I'm interested in investing passively by supplying general business loans to Fix/Flip/RE companies with an established record, who are looking for capital investments.

I will also supply their future lender with their detailed payment history.

Of course you could always supply that equity initially and replace it with a mezz note once the primary note is in place.

Are you up for supplying those Buyers?

It's freaky and obviously the worst things come to mind first (backed up sewage system, roots in pipes, faulty supply line, etc).  

My previous secretary manages our "production" lines, aggregate production, motor shop, and supply chain, then she graduated to 3 projects (20-30 people per project) doing it only by phone and bi-weekly reports and one foreman meeting each week, but those are more easy, just doing roads and small structures like drains and ditches.

I sell abatement supplies in the New York metro area.