That's why it's not selling.In most markets, your Maximum Allowable Offer (MAO) to a seller should be no more than:        MAO = (70% * ARV) - Repairs - Wholesale_Fee        MAO = (0.7 * 290K) - 40K - Wholesale_Fee        MAO = 203K - 40K - Wholesale_Fee        MAO = 163K - Wholesale_Fee               - OR -        MAO + Wholesale_Fee = 163KSo, you'd need to get this under contract with the seller at under $163K to make any money at all as a wholesaler.At $200K you're NEVER going to get any interest from experienced rehabbers.This is also why you probably got no resistance or pushback from the seller.

Just curious as to the source of your stress.Investing passively in real estate requires a different or additional analysis.  

.- the current rent will be around: $3700So we will have a difference of $2300 + additional fees like garbage, cap expenditure, rehab loan for the 4 units ( around $350 per month ) and others.

Owners mistakenly ASSUME all PMCs offer the exact SAME SERVICES and PERFORM those services EXACTLY THE SAME WAY, so price is the only differentiator – so, they often select the first PMC they call or that calls them back!

Another option could be to talk with the local cable provider to see what kind of marketing package they will offer. 

We'd be extremely grateful for any suggestions you can offer!

It will not go away, and it will not be needed in our daily lives, so I am reaching out here to figure out what would be the best thing to do with the additional income.

In addition, I manage a 600MM book of business at one of the top 4 firms. 

Hard money will charge you an arm & leg (additional points, high rates, etc.), but they'll get you the leverage you need.

If your calculation makes sense investment wise for you make an offer based on your numbers.It is hard for the seller to completely manipulate the income of a commercial property, if your lender is thorough it will be revealed in the financing process.