The easiest solution is typically keeping water away from the wall. 

There are several myths that we have to debunk before someone truly believes they can do it.You need millions of dollars to do a dealThat it’s too complicated to figure outThat permitting takes yearsIn those communities developments cost way less (think a couple hundred thousand along with a loan from a regional bank), permitting is not difficult (much less red tape), and the towns are small enough that both the city staff and the local architects and engineers and contractors all work with you to help you navigate the process since you’re all invested in making your community better.Note: The big boys can play in the primary & secondary markets.

@Kristin Vegas what ROI do you project to obtain on the MFR?

The guru your son is learning this technique from is likely not telling your son that the deal will almost certainly encourage your son to get an "off-market" deal from a "wholesaler" who is unlikely to properly disclose the details of the property or encourage an inspection. 

The deposit was carried over.Lease 3 was written to include only tenant Person B.From Lease 2, who do I have to and who can I refund the deposit to?

I have an off market opportunity for a 3 plex that I’m looking at.

The flipper pays 12.5% interest to the lender, and I receive 10% of that.

If we price it for what the comps show, then they are typically coming out of pocket every month. 

Part of the power of RE is leveraging - imagine one 250k house - paid off.

Purchase price: $150,000 Cash invested: $15,000 Sale price: $301,000 Found this deal off market and flipped it quickly for a profit.